Windows Automatic Updates

Windows Automatic Update Client Command Line Switches

wuauclt:

/r or /reportnow
/a or /resetauthorization
/detectnow
/? or /h or /help

Force an Update

wuauclt.exe /a /detectnow

Force a client to report to the WSUS server

wuauclt.exe /r

WSUS 3.0 SP1 Tips

1) Make sure Disk Quotas are disabled on the drive where you host the WSUS update files. Otherwise the MMC snap-in will fail with an "Out of disk space" error.

2) If you install WSUS 3 SP1 on port 8530, the SelfUpdate virtual directory isn't created. You will have to manually create the SelfUpdate virtual directory and point it to C:\Program Files\Update Services\Selfupdate (leave the default permissions)
Reference: Error 0x80244019 After Installing WSUS SP1