|I would have just run a repair. You'll need to take ownership of the files in order to access them. Information here: http://support.microsoft.com/kb/308421|
I'd then run a backup of those files and start from scratch. That will make for a cleaner install.
"So won’t you give this man his wings
What a shame
To have to beg you to see
We’re not all the same
What a shame" - Shinedown