What is the Windows alg.exe file and process?

What is alg.exe?

A Microsoft Windows file stored in the c:\windows\system32 or c:\winnt\system32 directory that has the file description: Application Layer Gateway Service. This file provides support for 3rd party protocol plug-ins for Internet Connection Sharing and the Windows Firewall.

Is this file a spyware, trojan, or virus?

The alg.exe file included with Microsoft Windows is not spyware, a trojan, or a virus. However, like any file on your computer it can become corrupted by a virus, worm, or trojan. antivirus programs can detect and clean this file if it has become infected. Because this file is part of Microsoft Windows users should never delete or remove this file if they think it is infected, let the antivirus program handle it.

Is it safe to remove alg.exe from the Task Manager processes?

Not recommended. Although this file is not a critical process if you click the End Process button for this task you'll likely encounter issues with your Internet connection and other programs that use the Internet. If you have already done this rebooting the computer will restart alg.exe and allow everything to work again.

Additional information

  • See our file definition for further information and related links on this term.