This copy of Windows ins not Genuine... MSN messenger sign in fails

I received the following message from a user... does anyone have a solution?

Immediately as my pc is booting up, I get a message "This copy of Windows is not genuine" When I click, resolve later,  I get a nearly continuous Message box in the lower right hand corner "Your system maybe at risk" and MSN Messager sign in box comes up.  When I sign in, I get a message that sign in failed & is temporarily unavailable.
stockcarsrusAsked:
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Joe RudSystems AdministratorCommented:
Best thing to do would be call Microsoft, explain the situation (assuming you have a legit copy).  They will help you get it running.

http://support.microsoft.com/oas/default.aspx?ln=en-us&x=10&y=11&prid=8430&gprid=37012
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and235100Commented:
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stockcarsrusAuthor Commented:
I know that the PC came with the OS loaded and was wondering why it would not let him into MSN messenger?  Can you uninstall the MS Genuine Advantage in the control panel?  Will that work?
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and235100Commented:
No - WGA is a core part of Windows.

You will have to bypass it - (or as Geisrud says - contact M$ft)

You cannot really "uninstall it".
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stockcarsrusAuthor Commented:
started happening after downloaded and installed automatic updates... KB905474? Any ideas?
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and235100Commented:
If you read: http://support.microsoft.com/?kbid=905474

Then it tells you that you cannot "uninstall" WGA - as I said.
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stockcarsrusAuthor Commented:
ID: 21980036 - has something like the users situation... did anyone get this to work seeing as the copy of Windows XP on the PC is legit?
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