So basically automatic repair always fails, so I can't really use that. I get to the blue screen menu thing and it tells me that srttrail.txt tells me what went wrong. So I opened this with the command prompt and it says that pdc.sys is corrupt. I've tried everything I really can in the blue menu, I also can't get the computer to run in safe mode. The only option that I can see being left is reinstalling windows but since it came preinstalled on my computer I don't have a clue where the product key would be. So it seems like the only option is to fork out money for windows if I can't find a solution to pdc.sys being corrupt. Any ideas at all?