I bought an Acer Aspire 5750 about four months ago and in that short space of time my ex-girlfriend and friends have clogged up my 640g hard drive with all kinds of stuff, downloaded games, programs and who knows what else. As she is now my ex, I can't and don't want to contact her and get her to undo whatever it is they've all done to it. As I'm new to the more technical things about computers, she was supposedly the computer whiz of the two of us but I doubt she even knows how to correct the problem. I've taken all that I want to keep, movies, pictures, music and all that and stored it all on an external hard drive and I was wondering if you could tell me how I can wipe all of the stuff off and start again. I'm told the hard drive is partitioned and you don't actually take windows 7 off of it, you just wipe the other partition. This is what I'd like to do as I lack technical knowledge and time to sift through 600g of stuff to look for any random stuff I might want to keep. If you could explain how to do this to me it would be much appreciated.