winlogon.exe is a program which is most likely legit. So, if winlogon.exe is on your PC, it is most likely ok, and will NOT be a cause for concern. Even if your system is virus-free, we still advise you to purchase a good antivirus with a good track record, in order to yourself your system against threats.
This program is normally stored on disk in C:\WINDOWS\system32\winlogon.exe.
The MD5 fingerprint for this program is 5c156ec4e44e30331bcc865a3b61d839.
This application is NOT a Windows service. This is very good.
winlogon.exe appears to use the functions of Windows SFC (System File Checker) or Windows File Protection.
64-bit code has been detected. This application can use the full power of a modern computer processor.
winlogon.exe is digitally signed. Nowadays the large majority of serious software applications are digitally signed.
The digital signature extracted from winlogon.exe verifies as ok. This is most likely a clean, ok program.
Digitally signed by: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This executable does NOT have an uninstall routine stored in registry.