PROBLEM FIXED! The "repair your computer" did the trick! It didn't even get to the "system recovery options" section, it was looking for errors before that. It said your system failed to start, windows is checking your system for errors. It took around 15 minutes to do this. After this it said windows found a problem which was due to a recent driver or software update and it said it was fixed. I restarted my pc and it was fine! It didn't even miss around with the boot loader. Both windows xp and windows vista work now.