alg.exe is a program which is probably legit. So, if alg.exe is on your PC, it is probably ok, and will NOT be a cause for concern. Even if your PC is virus-free, we still advise you to run a well-known antivirus with a good track record, in order to defend yourself against potential security problems.
This program is normally stored in C:\Windows\System32\alg.exe.
The MD5 checksum for this program is a1545b731579895d8cc44fc0481c1192.
This program is registered as a Windows service. This means it operates on your PC in background, usually without displaying any user interface to you. Most Windows services are legit programs, which perform useful features to other applications 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 can not use the full power of nowadays' PC CPUs. This is quite normal because the publishers did not upgrade it to 64-bit code.
The description stored in the exe is Application Layer Gateway Service.
File version stored as a property 6.0.6001.18000 (longhorn_rtm.080118-1840).
Maker Microsoft Corporation.
Intellectual property rights notice © Microsoft Corporation. All rights reserved..
alg.exe is digitally signed. Today the large majority of serious programs are digitally signed.
The digital signature attached to alg.exe checks out perfectly. This is excellent.
Digital certificate name: Microsoft Windows
Certificate's issuer name: Microsoft Windows Verification PCA
This application does NOT have an uninstall routine stored in registry.