I think this could be due to unspecified changes to the operating system
like visual studio 2003 update.
I restarted vista by pressing the off switch, then press it on again.
It comes to a prompt at startup for restoring system at the last known
working condition and that all personal files are not touched.
After restoring, I checked the windows update again and it asked me to
update the service pack for visual studio 2003. Dont update.
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