WSUS wouldnt let me uninstall it and would just fail and write "Product: Windows Server Update Services 3.0 SP2 -- Removal failed." to the Application Event Log.
A lot of people seem to have posted this issue, but none of the forums had a proper resolution to it. There were few analysis of the causes of the issue available though. Some belived that it was a problem with the ACL on the SQL/ Windows Internal DB, installation directory and suggested that DB be uninstalled manually by running "msiexec /x {CEB5780F-1A70-44A9-850F-DE6C4F6AA8FB} callerid=ocsetup.exe" ont he command prompt. It didnt work for me though.
Another analysis of the issue was that WSUS was installed with Windows Internal Database and somehow the registry was missing this information. The trick suggested was to modify the value of "wYukonInstalled" from 1 to 0 in the [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Update Services\Server\Setup] registry location. Choose to leave the Database on the uninstallation options. This worked and I was able to uninstall WSUS. The Windows Internal Database can be deleted from the default installation path "C:\WINDOWS\SYSMSI\SSEE".
This worked for me too, thanks
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