Hello! So I have an Acer Laptop and Windows Vista Home Premium. The problem is that it became unstable, I'm getting constant file system corruption and some stuff, like Windows Update and IE do no work. It's still usable, but sometimes I have to run chkdsk before the system starts. I do have the ACER reinstall discs that I created at the beginning, the problem is that they reinstall everything to factory settings and I can't repair with those discs, just reinstall. Just don't wanna do it, I would like first attempt a repair process without reinstall everything (like the windows upgrade process). Anyway, the question here is... If I use a pirate or downloaded Windows Vista DVD and attempt to repair Windows without reinstall everything, does it mess up the original license? From what I've gathered it asks you a key at the beginning... can I use the original windows key that came with the laptop? Will I be able to validate windows after that? I'm not sure if the full repair messes up the license or something... just don't wanna loose it. Thanks a lot guys!