If you want your computer to get updates from a WSUS server and it isn't part of a domain, use notepad to make a file called wsus.reg    (note that you will have to click on "all file types" or you will end up with a file called wsus.reg.txt -- change the xx to the IP of your WSUS server.

Paste the following text into notepad:


Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate] 
"AcceptTrustedPublisherCerts"=dword:00000001 
"ElevateNonAdmins"=dword:00000001 
"TargetGroup"="Workstations" 
"TargetGroupEnabled"=dword:00000000 
"WUServer"="http://134.39.158.XX:8530" 
"WUStatusServer"="http://134.39.158.XX:8530"

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU] 
"AUOptions"=dword:00000004 
"AUPowerManagement"=dword:00000001 
"AutoInstallMinorUpdates"=dword:00000001 
"DetectionFrequency"=dword:0000000a 
"DetectionFrequencyEnabled"=dword:00000001 
"IncludeRecommendedUpdates"=dword:00000001 
"NoAUAsDefaultShutdownOption"=dword:00000001 
"NoAUShutdownOption"=dword:00000001 
"NoAutoRebootWithLoggedOnUsers"=dword:00000001 
"NoAutoUpdate"=dword:00000000 
"RebootRelaunchTimeout"=dword:0000000a 
"RebootRelaunchTimeoutEnabled"=dword:00000001 
"RescheduleWaitTime"=dword:0000000a 
"RescheduleWaitTimeEnabled"=dword:00000001 
"ScheduledInstallDay"=dword:00000000 
"ScheduledInstallTime"=dword:00000003 
"UseWUServer"=dword:00000001