alg.exe is a program which is most likely legit. So, if alg.exe is on your laptop or desktop computer, it is most likely ok, and will NOT cause problems. Even if your system is clean, it is still recommended to use a well-known antivirus with a good detection rate, in order to defend your PC against potential security problems.
Normally, this program is stored in C:\WINDOWS\system32\alg.exe.
The MD5 checksum for this file is 3095da6a578656a4486d13728d6826ee.
This program is registered as a Windows service. This means it operates on your PC in background, usually without showing anything to you. Most Windows services are useful programs, which perform useful functions 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 application runs as a 32-bit program. It can not exploit the entire set of features of nowadays' computer processors. This is quite normal because the publishers did not upgrade it to 64-bit code.
The description stored in the file is Application Layer Gateway Service.
File version stored as a property 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158).
Company name Microsoft Corporation.
Legal copyright notice © Microsoft Corporation. All rights reserved..
alg.exe has a digital signature. Today the large majority of serious software applications are digitally signed.
The digital signature found in alg.exe verifies as ok. This is excellent.
Digitally signed by: Microsoft Windows Publisher
Certificate's issuer name: Microsoft Windows Verification Intermediate PCA
This program does NOT have an uninstall routine stored in registry.