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What does the alg.exe file do?

The alg.exe process is also known as Application Layer Gateway Service or, as the case may be, CPAX20 and is a part of Microsoft Windows Operating System or, as the case may be, CPAX20. This software is produced by Microsoft (www.microsoft.com) or, as the case may be, SornSoft. An obsolete or defective version of alg.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about alg.exe Application Layer Gateway service

alg.exe is a Windows system file. Alg.exe is found in the C:\Windows\System32 directory. Frequently occurring are file sizes such as 44,544 bytes (96% of all these files), 59,392 bytes as well as 14 other variants.
The application does not have a visible window, and does not appear on the taskbar. The file has been digitally signed by Microsoft itself to guarantee its authenticity. This particular software is connected to a server on the Internet or in your local network. Alg.exe is capable of transmit information from computer to the Internet. For this reason, 12% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

alg.exe is a system file used by Microsoft Windows, and appears in Windows Task Manager as a process named "Application Layer Gateway service." However, some viruses or Trojans use the same file name in order to remain undetected (e.g. Trojan-Spy.MSIL.Agent.egk or, as the case may be, Trojan-Clicker.Win32.Vesloruki.ahb (recognized by Kaspersky), as well as Trojan.ADH or, as the case may be, Trojan Horse (recognized by Symantec)).
To be really safe, you should scan your computer with two different anti-virus engines. You can use a free Anti-Malware scanner for this purpose.

Objectionable files with the same file name have the following characteristics:

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves alg.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about alg?

Application Layer Gateway Service
Alex
file is located in the c:\windows\System32 folder
nithin
If you delete it from C:\WINDOWS\system32 it reappear in 5-6 seconds. It's safe like Windows... (further information...)
Tommy Tomorrow

Summary: 183 users judge alg.exe to be an essential file that should not be touched. 34 users consider it harmless. However, 61 users consider this to be a suspicious process and would like to get rid of it. For this reason, 73 users have already deleted alg.exe. source: file.net

How to uninstall the program or CPAX20

alg.exe  Application Layer Gateway service fix

To remove Application Layer Gateway service from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for the program or CPAX20 in the list of available programs.
  5. Click Uninstall.

How to tell if alg.exe (Application Layer Gateway service) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of Application Layer Gateway service. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Application Layer Gateway service or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or alg.exe is causing problems for you, a good Registry Cleaner may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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