I want to do some testing with WSUS and have tried to delete a computer from WSUS. It used to work fine but I want to re-add it to WSUS as well. So, I have tried restarting, changing the computer name and restarting, deleting the three registry keys in HKLM\Software\Microsoft\Windows\Currentversion\Windowsupdate and also running wuauclt /resetauthorization followed by a restart and then run wuauclt /detectnow but nothing seems to be working for me. If I am checking the windowsupdate.log then I see that the client report "WARNING: Failed to obtain SusClientId". Does anyone have any clue for this issue? Thanks.
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