Start>Programs>Acessories>System Tools> System Restore.
Click the date that it was last working properly. Then it will take your computer back to that date and not lose any files you have downloaded. (Y)
Get a Ronie and have it built by Tart. I've had mine for a few months now, i've rimmed it hard quite a few times and its still perfectly straight!
Ronnie for the win. (Y)