What's so bad about using them?
Getting my new pc and I would buy Win 7 but Microsoft banned my Xbox live account for no reason so I lost around $150-200 worth of stuff
gonna get it back in the form of an OS
OS is the one thing I wouldn't use cracked. It's the most important piece of software in a PC, and wouldn't use a illegal copy of it. Yes there might not be any problems, but still. Get a legit copy and be happy.