RemoveWGA
Although Microsoft has already posted a knowledgebase article which I’ve posted about here, RemoveWGA does the removal process seamlessly just by executing it and thus should be worthy of mention.
After removal, Automatic Updates would probably prompt you to install it again, which you would have to choose ‘Custom installation’ and explicitly choose not to install it and ignore that update. Steps on how to do so can be found here (the screenshots are in French though).
I recently used it on my laptop to remove the WGA notifications as it recently kept hitting 100% CPU usage the moment Windows starts up and stays that way for a couple of minutes. After removal, everything seems back to normal again leading me to assume WGA is the culprit. I don’t think I’ve come across this behaviour being reported anywhere, but I can’t verify that on my desktop either as it’s running Windows Server 2003 which doesn’t have WGA notifications. I’ll be interested to know if anyone else experiences the same thing though. ;)
Edit: It wasn’t WGA to blame, but Microsoft Update instead. My bad. :| I’ve written about it here.
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