alg.exe is a program which is most likely NOT a virus or malware. So, if alg.exe is on your system, it is most likely ok, and will NOT cause problems. Even if your system is clean, it is still recommended to use a good antivirus with a good track record, in order to defend your PC against viruses and malware.
Usually, the default filename and path where this program is stored is
C:\WINDOWS\system32\alg.exe.
The MD5 fingerprint for this file is 8c515081584a38aa007909cd02020b3d.
This application is set up as a Windows service. This means it runs on your PC in background, usually without displaying anything to you. Most Windows services are ok programs, which provide useful features to other programs or to the Windows Operating System.
alg.exe appears to use the functions of Windows SFC (System File Checker) or Windows File Protection.
This executable runs in 32-bit mode. It does not use the full set of features of nowadays' PC processors. This ordinarily happens because the authors did not bother to upgrade it to use the x64 instruction set.
The description present in the exe is Application Layer Gateway Service.
File version stored as a property 5.1.2600.5512 (xpsp.080413-0852).
Company Microsoft Corporation.
Legal copyright © Microsoft Corporation. All rights reserved..
alg.exe has a digital signature. Nowadays most serious programs are digitally signed.
The digital signature extracted from alg.exe is valid. This is excellent.
Digitally signed by: Microsoft Windows Component Publisher
Certificate's issuer name: Microsoft Windows Verification Intermediate PCA
This application does NOT have an uninstall command stored in registry.