diff --git a/dlls/comctl32/string.c b/dlls/comctl32/string.c
index 5f4395e709e..45163fedc06 100644
--- a/dlls/comctl32/string.c
+++ b/dlls/comctl32/string.c
@@ -421,7 +421,7 @@ INT WINAPI StrCmpNW(LPCWSTR lpszStr, LPCWSTR lpszComp, INT iLen)
 /**************************************************************************
  * StrRChrA [COMCTL32.351]
  *
- * Find the last occurence of a character in string.
+ * Find the last occurrence of a character in string.
  *
  * PARAMS
  *  lpszStr [I] String to search in
@@ -572,7 +572,7 @@ LPWSTR WINAPI StrChrIW(LPCWSTR lpszStr, WCHAR ch)
 /*************************************************************************
  * StrRStrIA	[COMCTL32.372]
  *
- * Find the last occurence of a substring within a string.
+ * Find the last occurrence of a substring within a string.
  *
  * PARAMS
  *  lpszStr    [I] String to search in
@@ -580,7 +580,7 @@ LPWSTR WINAPI StrChrIW(LPCWSTR lpszStr, WCHAR ch)
  *  lpszSearch [I] String to look for
  *
  * RETURNS
- *  The last occurence lpszSearch within lpszStr, or NULL if not found.
+ *  The last occurrence lpszSearch within lpszStr, or NULL if not found.
  */
 LPSTR WINAPI StrRStrIA(LPCSTR lpszStr, LPCSTR lpszEnd, LPCSTR lpszSearch)
 {
@@ -709,7 +709,7 @@ int WINAPI StrCSpnIW(LPCWSTR lpszStr, LPCWSTR lpszMatch)
 /**************************************************************************
  * StrRChrIA	[COMCTL32.368]
  *
- * Find the last occurence of a character in string, ignoring case.
+ * Find the last occurrence of a character in string, ignoring case.
  *
  * PARAMS
  *  lpszStr [I] String to search in
diff --git a/dlls/commdlg/cdlg32.c b/dlls/commdlg/cdlg32.c
index 38cc88c42e2..1a50542ba11 100644
--- a/dlls/commdlg/cdlg32.c
+++ b/dlls/commdlg/cdlg32.c
@@ -131,8 +131,8 @@ BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD Reason, LPVOID Reserved)
  *	COMDLG32_AllocMem 			(internal)
  * Get memory for internal datastructure plus stringspace etc.
  *	RETURNS
- *		Pointer to a heap block: Succes
- *		NULL: Failure
+ *		Success: Pointer to a heap block
+ *		Failure: null
  */
 LPVOID COMDLG32_AllocMem(
 	int size	/* [in] Block size to allocate */
diff --git a/dlls/kernel/comm.c b/dlls/kernel/comm.c
index 9c5dd6d2fe0..2f1a3fcfd98 100644
--- a/dlls/kernel/comm.c
+++ b/dlls/kernel/comm.c
@@ -692,7 +692,7 @@ static BOOL COMM_GetCommError(HANDLE handle, LPDWORD lperror)
  *  Only TIOCSBRK and TIOCCBRK are supported.
  */
 BOOL WINAPI SetCommBreak(
-    HANDLE handle) /* [in] The communictions device to suspend. */
+    HANDLE handle) /* [in] The communications device to suspend. */
 {
 #if defined(TIOCSBRK) && defined(TIOCCBRK) /* check if available for compilation */
         int fd,result;
@@ -1395,7 +1395,7 @@ BOOL WINAPI SetCommState(
 		case ONESTOPBIT:
 				port.c_cflag &= ~CSTOPB;
 				break;
-		case ONE5STOPBITS: /* wil be selected if bytesize is 5 */
+		case ONE5STOPBITS: /* will be selected if bytesize is 5 */
 		case TWOSTOPBITS:
 				port.c_cflag |= CSTOPB;
 				break;
diff --git a/dlls/kernel/editline.c b/dlls/kernel/editline.c
index 2df3a7a332e..b61b45439af 100644
--- a/dlls/kernel/editline.c
+++ b/dlls/kernel/editline.c
@@ -192,7 +192,7 @@ static void WCEL_DeleteString(WCEL_Context* ctx, int beg, int end)
         /* completely erase all the others (full lines) */
         for (i = cbeg.Y + 1; i < cend.Y; i++)
             CONSOLE_FillLineUniform(ctx->hConOut, 0, i, ctx->csbi.dwSize.X, &ci);
-        /* erase from begining of line until last pos on last line */
+        /* erase from beginning of line until last pos on last line */
         CONSOLE_FillLineUniform(ctx->hConOut, 0, cend.Y, cend.X, &ci);
     }
     ctx->len -= str_len;
diff --git a/dlls/kernel/process.c b/dlls/kernel/process.c
index 53dfdacfb85..e4e379fc24c 100644
--- a/dlls/kernel/process.c
+++ b/dlls/kernel/process.c
@@ -1271,14 +1271,14 @@ static char **build_argv( const WCHAR *cmdlineW, int reserved )
         } else if (*s=='"') {
             /* '"' */
             if ((bcount & 1)==0) {
-                /* Preceeded by an even number of '\', this is half that
+                /* Preceded by an even number of '\', this is half that
                  * number of '\', plus a '"' which we discard.
                  */
                 d-=bcount/2;
                 s++;
                 in_quotes=!in_quotes;
             } else {
-                /* Preceeded by an odd number of '\', this is half that
+                /* Preceded by an odd number of '\', this is half that
                  * number of '\' followed by a '"'
                  */
                 d=d-bcount/2-1;
diff --git a/dlls/kernel/thunk.c b/dlls/kernel/thunk.c
index a984f1c3dcd..76492dc7e09 100644
--- a/dlls/kernel/thunk.c
+++ b/dlls/kernel/thunk.c
@@ -1216,7 +1216,7 @@ void WINAPI GetTEBSelectorFS16(void)
  *  If fn is given as NULL then the function expects hf16 to be valid.
  */
 BOOL16 WINAPI IsPeFormat16(
-	LPSTR	fn,	/* [in] Filename to the executeable */
+	LPSTR	fn,	/* [in] Filename to the executable */
 	HFILE16 hf16)	/* [in] An open file handle */
 {
     BOOL ret = FALSE;
diff --git a/dlls/kernel/time.c b/dlls/kernel/time.c
index 4ad09b24700..49f91994dcc 100644
--- a/dlls/kernel/time.c
+++ b/dlls/kernel/time.c
@@ -239,7 +239,7 @@ static BOOL TIME_GetTimezoneBias(
                   *pTZinfo, /* [in] The time zone data. */
     FILETIME      *lpFileTime,         /* [in] The system or local time. */
     BOOL           islocal,            /* [in] it is local time */       
-    LONG          *pBias               /* [out] The calulated bias in minutes */
+    LONG          *pBias               /* [out] The calculated bias in minutes */
     )
 {
     LONG bias = pTZinfo->Bias;
@@ -299,9 +299,9 @@ BOOL WINAPI SetLocalTime(
  *  Only the special case of disabled time adjustments is supported.
  */
 BOOL WINAPI GetSystemTimeAdjustment(
-    PDWORD lpTimeAdjustment,         /* [out] The clock adjustment per interupt in 100's of nanoseconds. */
-    PDWORD lpTimeIncrement,          /* [out] The time between clock interupts in 100's of nanoseconds. */
-    PBOOL  lpTimeAdjustmentDisabled) /* [out] The clock synchonisation has been disabled. */
+    PDWORD lpTimeAdjustment,         /* [out] The clock adjustment per interrupt in 100's of nanoseconds. */
+    PDWORD lpTimeIncrement,          /* [out] The time between clock interrupts in 100's of nanoseconds. */
+    PBOOL  lpTimeAdjustmentDisabled) /* [out] The clock synchronisation has been disabled. */
 {
     *lpTimeAdjustment = 0;
     *lpTimeIncrement = 0;
@@ -536,7 +536,7 @@ BOOL WINAPI GetProcessTimes(
     HANDLE     hprocess,       /* [in] The process to be queried (obtained from PROCESS_QUERY_INFORMATION). */
     LPFILETIME lpCreationTime, /* [out] The creation time of the process. */
     LPFILETIME lpExitTime,     /* [out] The exit time of the process if exited. */
-    LPFILETIME lpKernelTime,   /* [out] The time spent in kernal routines in 100's of nanoseconds. */
+    LPFILETIME lpKernelTime,   /* [out] The time spent in kernel routines in 100's of nanoseconds. */
     LPFILETIME lpUserTime)     /* [out] The time spent in user routines in 100's of nanoseconds. */
 {
     struct tms tms;
diff --git a/dlls/msi/msi.c b/dlls/msi/msi.c
index e31af7efb7f..e956b988b2a 100644
--- a/dlls/msi/msi.c
+++ b/dlls/msi/msi.c
@@ -862,7 +862,7 @@ INSTALLUI_HANDLERW WINAPI MsiSetExternalUIW(INSTALLUI_HANDLERW puiHandler,
  *   id            [I]  id of the string to be loaded
  *   lpBuffer      [O]  buffer for the string to be written to
  *   nBufferMax    [I]  maximum size of the buffer in characters
- *   lang          [I]  the prefered language for the string
+ *   lang          [I]  the preferred language for the string
  *
  * RETURNS
  *
diff --git a/dlls/msvcrt/mbcs.c b/dlls/msvcrt/mbcs.c
index 91a30884794..2abea3d0559 100644
--- a/dlls/msvcrt/mbcs.c
+++ b/dlls/msvcrt/mbcs.c
@@ -796,7 +796,7 @@ int _ismbslead(const unsigned char* start, const unsigned char* str)
  */
 int _ismbstrail(const unsigned char* start, const unsigned char* str)
 {
-  /* Must not be a lead, and must be preceeded by one */
+  /* Must not be a lead, and must be preceded by one */
   return !_ismbslead(start, str) && MSVCRT_isleadbyte(str[-1]);
 }
 
diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c
index 01ce36b02fa..6e8d8800259 100644
--- a/dlls/ntdll/heap.c
+++ b/dlls/ntdll/heap.c
@@ -1452,7 +1452,7 @@ ULONG WINAPI RtlSizeHeap( HANDLE heap, ULONG flags, PVOID ptr )
 /***********************************************************************
  *           RtlValidateHeap   (NTDLL.@)
  *
- * Determine if a block is a valid alloction from a heap.
+ * Determine if a block is a valid allocation from a heap.
  *
  * PARAMS
  *  heap  [I] Heap that block was allocated from
diff --git a/dlls/ntdll/large_int.c b/dlls/ntdll/large_int.c
index 02bc584ec30..bf80ca33396 100644
--- a/dlls/ntdll/large_int.c
+++ b/dlls/ntdll/large_int.c
@@ -389,8 +389,8 @@ LONGLONG WINAPI RtlExtendedMagicDivide(
  * NOTES
  *  Instead of base 0 it uses 10 as base.
  *  Writes at most length characters to the string str.
- *  Str is '\0' terminated when length allowes it.
- *  When str fits exactly in length characters the '\0' is ommitted.
+ *  Str is '\0' terminated when length allows it.
+ *  When str fits exactly in length characters the '\0' is omitted.
  *  If value_ptr is NULL it crashes, as the native function does.
  *
  * DIFFERENCES
diff --git a/dlls/ntdll/rtlbitmap.c b/dlls/ntdll/rtlbitmap.c
index d971bca2ad9..4ed95bac003 100644
--- a/dlls/ntdll/rtlbitmap.c
+++ b/dlls/ntdll/rtlbitmap.c
@@ -742,7 +742,7 @@ static ULONG NTDLL_FindSetRun(PCRTL_BITMAP lpBits, ULONG ulStart, PULONG lpSize)
     lpOut++;
   }
 
-  /* Count remaining contigious bits, if any */
+  /* Count remaining contiguous bits, if any */
   if (*lpOut & 1)
   {
     ULONG ulOffset = 0;
@@ -833,7 +833,7 @@ static ULONG NTDLL_FindClearRun(PCRTL_BITMAP lpBits, ULONG ulStart, PULONG lpSiz
     lpOut++;
   }
 
-  /* Count remaining contigious bits, if any */
+  /* Count remaining contiguous bits, if any */
   if (!(*lpOut & 1))
   {
     ULONG ulOffset = 0;
diff --git a/dlls/ntdll/rtlstr.c b/dlls/ntdll/rtlstr.c
index e8db8459bb2..55c33c84ab4 100644
--- a/dlls/ntdll/rtlstr.c
+++ b/dlls/ntdll/rtlstr.c
@@ -1353,8 +1353,8 @@ NTSTATUS WINAPI RtlAppendStringToString(
  *
  * NOTES
  *  if src is NULL dest is unchanged.
- *  dest is '\0' terminated when the MaximumLength allowes it.
- *  When dest fits exactly in MaximumLength characters the '\0' is ommitted.
+ *  dest is '\0' terminated when the MaximumLength allows it.
+ *  When dest fits exactly in MaximumLength characters the '\0' is omitted.
  *
  * DIFFERENCES
  *  Does not write in the src->Buffer beyond MaximumLength when
@@ -1392,8 +1392,8 @@ NTSTATUS WINAPI RtlAppendUnicodeToString(
  *
  * NOTES
  *  if src->length is zero dest is unchanged.
- *  dest is '\0' terminated when the MaximumLength allowes it.
- *  When dest fits exactly in MaximumLength characters the '\0' is ommitted.
+ *  dest is '\0' terminated when the MaximumLength allows it.
+ *  When dest fits exactly in MaximumLength characters the '\0' is omitted.
  *
  * DIFFERENCES
  *  Does not write in the src->Buffer beyond MaximumLength when
@@ -1692,8 +1692,8 @@ NTSTATUS WINAPI RtlCharToInteger(
  * NOTES
  *  Instead of base 0 it uses 10 as base.
  *  Writes at most length characters to the string str.
- *  Str is '\0' terminated when length allowes it.
- *  When str fits exactly in length characters the '\0' is ommitted.
+ *  Str is '\0' terminated when length allows it.
+ *  When str fits exactly in length characters the '\0' is omitted.
  */
 NTSTATUS WINAPI RtlIntegerToChar(
     ULONG value,   /* [I] Value to be converted */
diff --git a/dlls/ntdll/sec.c b/dlls/ntdll/sec.c
index ae8b68a995d..f247f3dd16b 100644
--- a/dlls/ntdll/sec.c
+++ b/dlls/ntdll/sec.c
@@ -190,7 +190,7 @@ DWORD WINAPI RtlLengthRequiredSid(DWORD nrofsubauths)
  * Determine the amount of memory a SID is using
  *
  * PARAMS
- *  pSid [I] SID to ge the size of.
+ *  pSid [I] SID to get the size of.
  *
  * RETURNS
  *  The size, in bytes, of pSid.
@@ -213,7 +213,7 @@ DWORD WINAPI RtlLengthSid(PSID pSid)
  *  nSubAuthorityCount   [I] Number of Sub Authorities
  *
  * RETURNS
- *  Success: TRUE. pSid is initialised withe the details given.
+ *  Success: TRUE. pSid is initialised with the details given.
  *  Failure: FALSE, if nSubAuthorityCount is >= SID_MAX_SUB_AUTHORITIES.
  */
 BOOL WINAPI RtlInitializeSid(
diff --git a/dlls/ole32/ole2.c b/dlls/ole32/ole2.c
index 39cbf545ec2..3b471c83e44 100644
--- a/dlls/ole32/ole2.c
+++ b/dlls/ole32/ole2.c
@@ -1036,7 +1036,7 @@ static BOOL OLEMenu_FindMainMenuIndex( HMENU hMainMenu, HMENU hPopupMenu, UINT *
  * All menu messages from these groups should be routed to the server.
  *
  * RETURNS: TRUE if the popup menu is part of a server owned group
- *          FASE if the popup menu is part of a container owned group
+ *          FALSE if the popup menu is part of a container owned group
  */
 BOOL OLEMenu_SetIsServerMenu( HMENU hmenu, OleMenuDescriptor *pOleMenuDescriptor )
 {
diff --git a/dlls/oleaut32/olepicture.c b/dlls/oleaut32/olepicture.c
index 142f4f15a65..729a239fd42 100644
--- a/dlls/oleaut32/olepicture.c
+++ b/dlls/oleaut32/olepicture.c
@@ -106,7 +106,7 @@ typedef struct OLEPictureImpl {
     IPersistStreamVtbl *lpvtbl3;
     IConnectionPointContainerVtbl *lpvtbl4;
 
-  /* Object referenece count */
+  /* Object reference count */
     DWORD ref;
 
   /* We own the object and must destroy it ourselves */
@@ -705,7 +705,7 @@ static HRESULT WINAPI OLEPictureImpl_get_Attributes(IPicture *iface,
   TRACE("(%p)->(%p).\n", This, pdwAttr);
   *pdwAttr = 0;
   switch (This->desc.picType) {
-  case PICTYPE_BITMAP: 	break;	/* not 'truely' scalable, see MSDN. */
+  case PICTYPE_BITMAP: 	break;	/* not 'truly' scalable, see MSDN. */
   case PICTYPE_ICON: *pdwAttr     = PICTURE_TRANSPARENT;break;
   case PICTYPE_METAFILE: *pdwAttr = PICTURE_TRANSPARENT|PICTURE_SCALABLE;break;
   default:FIXME("Unknown pictype %d\n",This->desc.picType);break;
diff --git a/dlls/oleaut32/tests/vartype.c b/dlls/oleaut32/tests/vartype.c
index 5df7a0d63f7..3f223e0b3af 100644
--- a/dlls/oleaut32/tests/vartype.c
+++ b/dlls/oleaut32/tests/vartype.c
@@ -4498,7 +4498,7 @@ static void test_VarBoolFromStr(void)
     CONVERT_STR(VarBoolFromStr,"faux",0); EXPECT_MISMATCH;
     /* But accepted if this flag is given */
     CONVERT_STR(VarBoolFromStr,"faux",VARIANT_LOCALBOOL); EXPECT(VARIANT_FALSE);
-    /* Regardless of case - from this we assume locale text comparasons ignore case */
+    /* Regardless of case - from this we assume locale text comparisons ignore case */
     CONVERT_STR(VarBoolFromStr,"Faux",VARIANT_LOCALBOOL); EXPECT(VARIANT_FALSE);
 
     /* Changing the locale prevents the localised text from being compared -
diff --git a/dlls/oleaut32/typelib.c b/dlls/oleaut32/typelib.c
index 1b90eb95274..c6767274547 100644
--- a/dlls/oleaut32/typelib.c
+++ b/dlls/oleaut32/typelib.c
@@ -866,7 +866,7 @@ static ITypeLib2* ITypeLib2_Constructor_SLTG(LPVOID pLib, DWORD dwTLBLength);
 
 /*======================= ITypeInfo implementation =======================*/
 
-/* data for refernced types */
+/* data for referenced types */
 typedef struct tagTLBRefType
 {
     INT index;              /* Type index for internal ref or for external ref
@@ -1925,7 +1925,7 @@ static void MSFT_DoVars(TLBContext *pcx, ITypeInfoImpl *pTI, int cFuncs,
         recoffset += reclength;
     }
 }
-/* fill in data for a hreftype (offset). When the refernced type is contained
+/* fill in data for a hreftype (offset). When the referenced type is contained
  * in the typelib, it's just an (file) offset in the type info base dir.
  * If comes from import, it's an offset+1 in the ImpInfo table
  * */
@@ -3081,7 +3081,7 @@ static SLTG_TypeInfoTail *SLTG_ProcessEnum(char *pBlk, ITypeInfoImpl *pTI,
   return (SLTG_TypeInfoTail*)(pFirstItem + pMemHeader->cbExtra);
 }
 
-/* Because SLTG_OtherTypeInfo is such a painfull struct, we make a more
+/* Because SLTG_OtherTypeInfo is such a painful struct, we make a more
    managable copy of it into this */
 typedef struct {
   WORD small_no;
@@ -4116,7 +4116,7 @@ static ULONG WINAPI ITypeInfo_fnRelease(ITypeInfo2 *iface)
     TRACE("(%p)->(%lu)\n",This, ref);
 
     if (ref)   {
-      /* We don't release ITypeLib when ref=0 becouse
+      /* We don't release ITypeLib when ref=0 because
          it means that funtion is called by ITypeLi2_Release */
       ITypeLib2_Release((ITypeLib2*)This->pTypeLib);
     } else   {
diff --git a/dlls/oleaut32/typelib2.c b/dlls/oleaut32/typelib2.c
index 7c7ecb4acfb..cf34267d7f3 100644
--- a/dlls/oleaut32/typelib2.c
+++ b/dlls/oleaut32/typelib2.c
@@ -140,7 +140,7 @@ typedef struct tagMSFT_ImpFile {
     int guid;
     LCID lcid;
     int version;
-    char filename[0]; /* preceeded by two bytes of encoded (length << 2) + flags in the low two bits. */
+    char filename[0]; /* preceded by two bytes of encoded (length << 2) + flags in the low two bits. */
 } MSFT_ImpFile;
 
 typedef struct tagICreateTypeLib2Impl
@@ -2055,7 +2055,7 @@ static HRESULT WINAPI ICreateTypeInfo2_fnSetFuncCustData(
 static HRESULT WINAPI ICreateTypeInfo2_fnSetParamCustData(
         ICreateTypeInfo2* iface, /* [I] The typeinfo in which to set the custom data. */
         UINT indexFunc,          /* [I] The index of the function on which the parameter resides. */
-        UINT indexParam,         /* [I] The index of the paramter on which to set the custom data. */
+        UINT indexParam,         /* [I] The index of the parameter on which to set the custom data. */
         REFGUID guid,            /* [I] The GUID used as a key to retrieve the custom data. */
         VARIANT* pVarVal)        /* [I] The custom data. */
 {
diff --git a/dlls/oleaut32/varformat.c b/dlls/oleaut32/varformat.c
index 43e086b15a9..c1c02dd567a 100644
--- a/dlls/oleaut32/varformat.c
+++ b/dlls/oleaut32/varformat.c
@@ -885,7 +885,7 @@ HRESULT WINAPI VarTokenizeFormatString(LPOLESTR lpszFormat, LPBYTE rgbTok,
         TRACE("h\n");
       }
       fmt_state &= ~FMT_STATE_OPEN_COPY;
-      /* Note that now we have seen an hours token, the next occurence of
+      /* Note that now we have seen an hours token, the next occurrence of
        * 'mm' indicates minutes, not months.
        */
       fmt_state |= FMT_STATE_SEEN_HOURS;
diff --git a/dlls/shell32/shell32_main.c b/dlls/shell32/shell32_main.c
index 5263bfc81cc..4a85a99cbb1 100644
--- a/dlls/shell32/shell32_main.c
+++ b/dlls/shell32/shell32_main.c
@@ -199,7 +199,7 @@ LPWSTR* WINAPI CommandLineToArgvW(LPCWSTR lpCmdline, int* numargs)
             /* '"' */
             if ((bcount & 1)==0)
             {
-                /* Preceeded by an even number of '\', this is half that
+                /* Preceded by an even number of '\', this is half that
                  * number of '\', plus a quote which we erase.
                  */
                 d-=bcount/2;
@@ -208,7 +208,7 @@ LPWSTR* WINAPI CommandLineToArgvW(LPCWSTR lpCmdline, int* numargs)
             }
             else
             {
-                /* Preceeded by an odd number of '\', this is half that
+                /* Preceded by an odd number of '\', this is half that
                  * number of '\' followed by a '"'
                  */
                 d=d-bcount/2-1;
diff --git a/dlls/shlwapi/assoc.c b/dlls/shlwapi/assoc.c
index 480f3ee1260..153f1d43e27 100644
--- a/dlls/shlwapi/assoc.c
+++ b/dlls/shlwapi/assoc.c
@@ -43,7 +43,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(shell);
  *  when you right-click on a file).
  *
  * HELPERS
- * You can use this object tranparently by calling the helper functions
+ * You can use this object transparently by calling the helper functions
  * AssocQueryKeyA(), AssocQueryStringA() and AssocQueryStringByKeyA(). These
  * create an IQueryAssociations object, perform the requested actions
  * and then dispose of the object. Alternatively, you can create an instance
diff --git a/dlls/shlwapi/string.c b/dlls/shlwapi/string.c
index d059b22fbae..f51988f8984 100644
--- a/dlls/shlwapi/string.c
+++ b/dlls/shlwapi/string.c
@@ -534,7 +534,7 @@ LPWSTR WINAPI StrStrW(LPCWSTR lpszStr, LPCWSTR lpszSearch)
 /*************************************************************************
  * StrRStrIA	[SHLWAPI.@]
  *
- * Find the last occurence of a substring within a string.
+ * Find the last occurrence of a substring within a string.
  *
  * PARAMS
  *  lpszStr    [I] String to search in
@@ -542,7 +542,7 @@ LPWSTR WINAPI StrStrW(LPCWSTR lpszStr, LPCWSTR lpszSearch)
  *  lpszSearch [I] String to look for
  *
  * RETURNS
- *  The last occurence lpszSearch within lpszStr, or NULL if not found.
+ *  The last occurrence lpszSearch within lpszStr, or NULL if not found.
  */
 LPSTR WINAPI StrRStrIA(LPCSTR lpszStr, LPCSTR lpszEnd, LPCSTR lpszSearch)
 {
@@ -711,7 +711,7 @@ int WINAPI StrToIntW(LPCWSTR lpszStr)
  * NOTES
  *  Leading whitespace, '-' and '+' are allowed before the number. If
  *  dwFlags includes STIF_SUPPORT_HEX, hexadecimal numbers are allowed, if
- *  preceeded by '0x'. If this flag is not set, or there is no '0x' prefix,
+ *  preceded by '0x'. If this flag is not set, or there is no '0x' prefix,
  *  the string is treated as a decimal string. A leading '-' is ignored for
  *  hexadecimal numbers.
  */
@@ -1171,7 +1171,7 @@ static LPWSTR WINAPI SHLWAPI_StrRChrHelperW(LPCWSTR lpszStr,
 /**************************************************************************
  * StrRChrA	[SHLWAPI.@]
  *
- * Find the last occurence of a character in string.
+ * Find the last occurrence of a character in string.
  *
  * PARAMS
  *  lpszStr [I] String to search in
@@ -1205,7 +1205,7 @@ LPWSTR WINAPI StrRChrW(LPCWSTR lpszStr, LPCWSTR lpszEnd, WORD ch)
 /**************************************************************************
  * StrRChrIA	[SHLWAPI.@]
  *
- * Find the last occurence of a character in string, ignoring case.
+ * Find the last occurrence of a character in string, ignoring case.
  *
  * PARAMS
  *  lpszStr [I] String to search in
diff --git a/dlls/win32s/w32sys.c b/dlls/win32s/w32sys.c
index 414c26f13c9..b79e5e6e69d 100644
--- a/dlls/win32s/w32sys.c
+++ b/dlls/win32s/w32sys.c
@@ -74,7 +74,7 @@ WORD WINAPI GetW32SysVersion16(void)
  *	dunno what.
  */
 WORD WINAPI GetPEResourceTable16(
-	HFILE16 hf		/* [in] filedescriptor to opened executeable */
+	HFILE16 hf		/* [in] Handle of executable file */
 ) {
 	return 0;
 }
@@ -90,12 +90,12 @@ DWORD WINAPI LoadPeResource16(WORD x,SEGPTR y) {
 
 /**********************************************************************
  *		IsPeFormat		(W32SYS.2)
- * Checks the passed filename if it is a PE format executeable
+ * Check if a file is a PE format executable.
  * RETURNS
  *  TRUE, if it is.
  *  FALSE if not.
  */
-BOOL16 WINAPI IsPeFormat16( LPSTR fn,      /* [in] filename to executeable */
+BOOL16 WINAPI IsPeFormat16( LPSTR fn,      /* [in] filename of executable */
                             HFILE16 hf16 ) /* [in] open file, if filename is NULL */
 {
     BOOL16 ret = FALSE;
diff --git a/dlls/wineps/graphics.c b/dlls/wineps/graphics.c
index 8d52af5a728..a38f8afe80b 100644
--- a/dlls/wineps/graphics.c
+++ b/dlls/wineps/graphics.c
@@ -124,7 +124,7 @@ BOOL PSDRV_Rectangle( PSDRV_PDEVICE *physDev, INT left, INT top, INT right, INT
     rect.bottom = bottom;
     LPtoDP( physDev->hdc, (POINT *)&rect, 2 );
 
-    /* Windows does something truely hacky here.  If we're in passthrough mode
+    /* Windows does something truly hacky here.  If we're in passthrough mode
        and our rop is R2_NOP, then we output the string below.  This is used in
        Office 2k when inserting eps files */
     if(physDev->job.in_passthrough && !physDev->job.had_passthrough_rect && GetROP2(physDev->hdc) == R2_NOP) {
diff --git a/dlls/wininet/netconnection.c b/dlls/wininet/netconnection.c
index 1605b101708..9170e6454c6 100644
--- a/dlls/wininet/netconnection.c
+++ b/dlls/wininet/netconnection.c
@@ -52,7 +52,7 @@
 WINE_DEFAULT_DEBUG_CHANNEL(wininet);
 
 /* FIXME!!!!!!
- *    This should use winsock - To use winsock the funtions will have to change a bit
+ *    This should use winsock - To use winsock the functions will have to change a bit
  *        as they are designed for unix sockets.
  *    SSL stuff should use crypt32.dll
  */
@@ -74,7 +74,7 @@ static SSL_CTX *ctx;
 
 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
 
-/* OpenSSL funtions that we use */
+/* OpenSSL functions that we use */
 MAKE_FUNCPTR(SSL_library_init);
 MAKE_FUNCPTR(SSL_load_error_strings);
 MAKE_FUNCPTR(SSLv23_method);
diff --git a/programs/regedit/regproc.c b/programs/regedit/regproc.c
index 9d9f19d698b..a225fc538fb 100644
--- a/programs/regedit/regproc.c
+++ b/programs/regedit/regproc.c
@@ -609,7 +609,7 @@ void doSetValue(LPSTR stdInput)
 }
 
 /******************************************************************************
- * This funtion is the main entry point to the queryValue type of action.  It
+ * This function is the main entry point to the queryValue type of action.  It
  * receives the currently read line and dispatch the work depending on the
  * context.
  */
@@ -647,7 +647,7 @@ void doQueryValue(LPSTR stdInput)
 }
 
 /******************************************************************************
- * This funtion is the main entry point to the deletetValue type of action.  It
+ * This function is the main entry point to the deleteValue type of action.  It
  * receives the currently read line and dispatch the work depending on the
  * context.
  */
@@ -657,7 +657,7 @@ void doDeleteValue(LPSTR line)
 }
 
 /******************************************************************************
- * This funtion is the main entry point to the deleteKey type of action.  It
+ * This function is the main entry point to the deleteKey type of action.  It
  * receives the currently read line and dispatch the work depending on the
  * context.
  */
@@ -667,7 +667,7 @@ void doDeleteKey(LPSTR line)
 }
 
 /******************************************************************************
- * This funtion is the main entry point to the createKey type of action.  It
+ * This function is the main entry point to the createKey type of action.  It
  * receives the currently read line and dispatch the work depending on the
  * context.
  */
@@ -975,7 +975,7 @@ void processRegLines(FILE *in, CommandAPI command)
 }
 
 /******************************************************************************
- * This funtion is the main entry point to the registerDLL action.  It
+ * This function is the main entry point to the registerDLL action.  It
  * receives the currently read line, then loads and registers the requested DLLs
  */
 void doRegisterDLL(LPSTR stdInput)
@@ -1008,7 +1008,7 @@ void doRegisterDLL(LPSTR stdInput)
 }
 
 /******************************************************************************
- * This funtion is the main entry point to the unregisterDLL action.  It
+ * This function is the main entry point to the unregisterDLL action.  It
  * receives the currently read line, then loads and unregisters the requested DLLs
  */
 void doUnregisterDLL(LPSTR stdInput)
diff --git a/programs/rundll32/rundll32.c b/programs/rundll32/rundll32.c
index 4a11d48dfa1..1ab93c17437 100644
--- a/programs/rundll32/rundll32.c
+++ b/programs/rundll32/rundll32.c
@@ -179,14 +179,14 @@ static LPWSTR GetNextArg(LPWSTR *cmdline)
         } else if (*s=='"') {
             /* '"' */
             if ((bcount & 1)==0) {
-                /* Preceeded by an even number of '\', this is half that
+                /* Preceded by an even number of '\', this is half that
                  * number of '\', plus a quote which we erase.
                  */
                 d-=bcount/2;
                 in_quotes=!in_quotes;
                 s++;
             } else {
-                /* Preceeded by an odd number of '\', this is half that
+                /* Preceded by an odd number of '\', this is half that
                  * number of '\' followed by a '"'
                  */
                 d=d-bcount/2-1;
diff --git a/programs/winefile/winefile.c b/programs/winefile/winefile.c
index 53612583731..5e806c85039 100644
--- a/programs/winefile/winefile.c
+++ b/programs/winefile/winefile.c
@@ -2158,7 +2158,7 @@ static void init_output(HWND hwnd)
 static void draw_item(Pane* pane, LPDRAWITEMSTRUCT dis, Entry* entry, int calcWidthCol);
 
 
-/* calculate prefered width for all visible columns */
+/* calculate preferred width for all visible columns */
 
 static BOOL calc_widths(Pane* pane, BOOL anyway)
 {
@@ -2245,7 +2245,7 @@ static BOOL calc_widths(Pane* pane, BOOL anyway)
 }
 
 
-/* calculate one prefered column width */
+/* calculate one preferred column width */
 
 static void calc_single_width(Pane* pane, int col)
 {
diff --git a/tools/widl/write_msft.c b/tools/widl/write_msft.c
index d475afa3725..70e4b904d40 100644
--- a/tools/widl/write_msft.c
+++ b/tools/widl/write_msft.c
@@ -76,7 +76,7 @@ typedef struct tagMSFT_ImpFile {
     int guid;
     LCID lcid;
     int version;
-    char filename[0]; /* preceeded by two bytes of encoded (length << 2) + flags in the low two bits. */
+    char filename[0]; /* preceded by two bytes of encoded (length << 2) + flags in the low two bits. */
 } MSFT_ImpFile;
 
 typedef struct _msft_typelib_t
diff --git a/tools/wrc/newstruc.c b/tools/wrc/newstruc.c
index 499844a9f05..c9c056082f1 100644
--- a/tools/wrc/newstruc.c
+++ b/tools/wrc/newstruc.c
@@ -679,8 +679,8 @@ cursor_group_t *new_cursor_group(raw_data_t *rd, int *memopt)
  * The "LIST" tag may occur several times and may encapsulate different
  * tags. The `steps' is the number of "icon" tags found (actually the
  * number of steps specified in the aniheader_t structure). The "seq "uence
- * tag can be ommitted, in which case the sequence is equal to the sequence
- * of "icon"s found in the file. Also "rate" may be ommitted, in which case
+ * tag can be omitted, in which case the sequence is equal to the sequence
+ * of "icon"s found in the file. Also "rate" may be omitted, in which case
  * the default from the aniheader_t structure is used.
  *
  * An animated cursor puts `.cur' formatted files into each "icon" tag,
diff --git a/windows/cursoricon.c b/windows/cursoricon.c
index 69f38b030c6..f2464fb194d 100644
--- a/windows/cursoricon.c
+++ b/windows/cursoricon.c
@@ -586,7 +586,7 @@ static BOOL CURSORICON_SimulateLoadingFromResourceW( LPCWSTR filename, BOOL fCur
     *ptr = NULL;
     if (!(bits = map_fileW( filename, &filesize ))) return FALSE;
 
-    /* FIXME: test for inimated icons
+    /* FIXME: test for animated icons
      * hack to load the first icon from the *.ani file
      */
     if ( *(LPDWORD)bits==0x46464952 ) /* "RIFF" */
diff --git a/windows/spy.c b/windows/spy.c
index 3b3819d3317..771f9788186 100644
--- a/windows/spy.c
+++ b/windows/spy.c
@@ -1325,7 +1325,7 @@ const USER_MSG   *lastmsg;    /* pointer to last USER_MSG for class   */
 
 /* To dump memory at the lParam for any of these messages,  */
 /* replace the "0" with a "SZOF(structure)", or with a      */
-/* number. (First method prefered.)                         */
+/* number. (First method preferred.)                         */
 
 #define RB_GETBANDINFO_OLD (WM_USER+5) /* obsoleted after IE3, but we have to support it anyway */
 
diff --git a/windows/user.c b/windows/user.c
index e0a70e9759e..f758530b662 100644
--- a/windows/user.c
+++ b/windows/user.c
@@ -303,7 +303,7 @@ static HANDLE *USER_GetProcessHandleList(void)
         if (!r)
             break;
 
-        /* don't kill outselves */
+        /* don't kill ourselves */
         if (GetCurrentProcessId() == pe.th32ProcessID )
             continue;