Okay so like a while back i used to work on Windows Xp...then I added Windows 7 when microsoft was letting out the first beta. Now i can go on either, but i downloaded an iso with the full windows 7 already activated and final release and i wanna use it. I'm gunna back up my files on my C drive and put windows 7 on the d drive. But if i do this will it overwrite the previous OS on the D drive or just add along with it or overwrite completely?
sorry if im making this sound complex too