I backed up my C drive with BackUpMyPC. I put the backup on an external harddrive. If anything should happen, it's there.

There is a thing called a recovery console that you should have gotten with your PC . It basically allows you to boot up your PC with it. There is also a hacked version of it online if you don't have one. I can give you the link if you need it. I can verify that it works because I've used it. It allows you to copy files and repair files , etc. I'm not expert with it but if you knew which file was causing you the problem you could potentially overwrite the bad file with a good one and your problem would be fixed.

All of my important info is on my C drive/operating drive so I'd be screwed if something happened to mine. Good luck with it.