Sorry to read of the problems, Amanda, but I suspect that your PC is in a state that a System Restore is not going to help. Windows Live OneCare does not set permissions.
If you are certain that the blue screen was not caused by a hardware problem, as I suspect, but the result of a recently installed program or driver or even a malware infection, you can try OneCare support.
How to reach support (FAQ) - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90Personally, I'd contact HP support for help or make sure that you have all data backed up and then do a factory restore of the PC per the HP instructions and reinstall your software and restore the data after confirming that the problem was resolved by the factory restore. Yes, that would be a pain. :-(
-steve
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