Although it is a pain to ensure you have saved everything you need, and to re-install everything else, I wish I'd done it a week ago
I probably won't re-install half the rubbish I had on there....
Even if it doesn't fix it, at least you will know you have eliminated just about all software problems...
Yeah, I do a fresh install about once a year. It's amazing how fast the crap builds up on your PC.