Question : Unable to see PCs in WSUS

I deleted some PCs within the WSUS 3.0 console.  Now I am trying to get WSUS to see them again, but an unable to do so.  The PCs are in the correct OU in Active Directory where the WSUS policy is set.  I tried running "wuauclt /detectnow" on the PCs, but that didn't seem to help.  Strangely enough, the automatic updates are occuring on these PCs as they should, but I can't see them in WSUS.  The reason I deleted them from WSUS in the first place is that they were slated to be removed and replaced with newer PC, and for whatever reason thought that it would be a good idea to delete them so WSUS would pick them back up again (Apparently not).  

Answer : Unable to see PCs in WSUS

Hi Marie:

Please verify the following for me:

a) the GPO assigned to the clients which overrides their Automatic Update settings is actually applying. There are several ways to do this. Client-side rsop.msc, or Run the modeling wizard from the GPO Management

b) the client machines protection filters (whatever they maybe, i.e. defender, symantec, etc.) actually show the systems as clean

Once those 2 are verified, you can try the following trick on the client systems by running the following commands in a batch file:

rem Fixes problem with client machines not showing up on the server due to imaging method

reg delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate /v AccountDomainSid /f
reg delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate /v PingID /f
reg delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate /v SusClientId /f
cls
@echo Triggering detection after resetting WSUS client identity
net stop wuauserv
net start wuauserv
wuauclt /resetauthorization /detectnow

Hope this helps! :)

--VTK