Application Extension Library – ADVPACK.DLL

Advpack.dll is an application extension library found in the windows\system folder of Windows 95 and 98 (win98_26.cab) or the Windows\System32 file in Win 2000/XP. It is used to run .inf file installs. As an example, this file runs to complete the install of Windows Defender, a Microsoft Antispyware program.

You may see this file listed as "rundll32 advpack.dll". RunDLL and RunDLL32 are commonly found in the startup group and used to call functions directly within a special program library that may be shared by other programs.

Common error messages relate to incorrect versions of this file used with Internet Explorer 4.x, 5.x and 6.x, Outlook Express, Windows Media Player, FrontPage Express, and Office XP.

Safe

Microsoft