Virus Precaution:
The original wuauclt.exe from Microsoft gets placed in the Located at C:\WINDOWS\System32\wuauclt.exe . If you find it anywhere else then you should be suspicious for sure.

You'll want to keep an eye on this google search for any known viruses.

.

Backdoor.Clt @ Symantec Corporation
Troj/Cult-B @ Sophos

More files in this category:

lsass.exe | alg.exe | Svchost.exe | csrss.exe | Spoolsv.exe | wowexec.exe | Smss.exe | wuauclt.exe | ctfmon.exe | dwwin.exe | wmiprvse.exe | Winlogon.exe | msmsgs.exe | rundll32.exe | wisptis.exe | mdm.exe | cidaemon.exe | wscntfy.exe | Winmgmt.exe | msdxm.ocx |