Looks like that particular Vista Inspirat installation has somehow corrupt your system 32 folder. And you should have turn on your System Restore though. Last time I've it turned on, and there's a corrupted theme I installed and have it uninstalled using System Restore.
Edit: Since you don't have it turned on, I guess you have to go through a difficult process in fixing it.
I will help you find a solution on the net, and post it here if I can find it.
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