Information about the Unsafe File List in Internet Explorer 6, 7, or 8

Gælder for: Microsoft Windows Server 2003 Web EditionMicrosoft Windows Server 2003 Datacenter Edition (32-bit x86)Microsoft Windows Server 2003 Enterprise Edition (32-bit x86)


Internet Explorer versions 6, 7, and 8 include an "unsafe" file list that is coded in the Shdocvw.dll file. The purpose of the unsafe file list is to prevent you from accidentally opening a file type that could potentially cause problems on your computer.

More Information

The Internet Explorer unsafe file list has been updated to be consistent with the Microsoft Office unsafe file list. The following file types have been added to the unsafe file list:

file extensionfile type
.adMicrosoft Access project extension
.adpAccess project
.crtSecurity certificate
.insInternet Naming service
.mdbAccess program
.mdeAccess MDE database
.mscMicrosoft Common Console document
.mspMicrosoft Windows Installer patch
.sct Windows script component
.shbShell scrap object
.vb VBScript file
.wscWindows script component
.wsf Windows script file
.cpl Control Panel extension
.shs Shell scrap object
.vsd Microsoft Visio file type
.vst Visio file type
.vss Visio file type
.vsw Visio file type
The complete unsafe file list in Internet Explorer includes the file types that are listed in the previous table, plus the following file types:

  • .asp
  • .bas
  • .bat
  • .chm
  • .cmd
  • .com
  • .exe
  • .hlp
  • .hta
  • .inf
  • .isp
  • .js
  • .jse
  • .lnk
  • .msi
  • .mst
  • .pcd
  • .pif
  • .reg
  • .scr
  • .url
  • .vbe
  • .vbs
  • .ws
  • .wsh
For more information about understanding executable content in Microsoft Products, visit the following Microsoft Web site:

Modifying the Unsafe File List

For additional information on modifying the unsafe file list, click the article number below to view the article in the Microsoft Knowledge Base:

291387 OLEXP: Using Virus Protection Features in Outlook Express 6
For additional information about how to show file name extensions, click the following article number to view the article in the Microsoft Knowledge Base:

865219 How to show or hide file name extensions in Windows Explorer