WSUS / Windows Update services client commands

Force Detection of Updates and Report to the WSUS Server:

open command prompt and type the following commands

wuauclt.exe /detectnow /reportnow

Windows Update Log (Checking Errors/Process Status):

%WINDIR%\WindowsUpdate.log

Cleanup all cached files and force detection:

net stop wuauserv
net start wuauserv
wuauclt.exe /resetauthorization /detectnow

Delete winhttpproxy settings:
proxycfg -d
wuauclt /detectnow /register /reportnow