I have a little issue that I am not sure what to do. I am tring to a repair for my windows xp and it has me enter my product key to validate and its not accepting it. Microsoft says to disable my antivirus. Ok, that was simple yesterday, before I started. Now I have installed some of software and it doesn't go into windows, goes into the setup/repair feature. Is there a way to disable the avast? Its been so lone since I have done anything of this nature that I just don't remember how to go about it. It seams like you used to be able to boot to ms dos somehow and run an application. Any ideas?