I've always heard that the Users who can really benefit from RAID are video editors.
You might work through some of the other troubleshooting tips
linked earlier as a last resort before reinstall.
Here are tips for getting a purrfect clean reinstall based on hundreds done here - use the ones which apply: re-install windows 7
It's especially important to wipe the HD of all code as boot sector corruption cannot be ruled out. Reinstall is also a good time to test your HD's and RAM using tools listed earlier.