winlogon.exe is a program which is probably NOT a virus. So, if winlogon.exe is on your system, it is probably ok, and will NOT cause problems. Even if your PC is clean, it is still recommended to purchase a well-known antivirus with a good track record, in order to defend your system against threats.
Usually, this program is located in C:\WINDOWS\system32\winlogon.exe.
The MD5 fingerprint for this executable is 01c3346c241652f43aed8e2149881bfe.
This application is NOT a Windows service. This is very good.
winlogon.exe seems to have something to do with Windows SFC (System File Checker) or Windows File Protection.
This program runs as a 32-bit program. It can not use the entire power of nowadays' PC CPUs. This ordinarily happens because the publishers did not bother to upgrade it to use the x64 instruction set.
The description present in the program is Windows NT Logon Application.
File version stored as a property 5.1.2600.2180 (xpsp_sp2_rtm.040803-2158).
Maker Microsoft Corporation.
Copyright notice © Microsoft Corporation. All rights reserved..
Some dangerous features of the Operating System have been used, such as functions for intercepting the keyboard. We recommend you to perform more in-depth research about this program.
winlogon.exe has a digital signature. Today most virus-free programs are digitally signed.
The digital signature extracted from winlogon.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 command set up in registry.