Recently I had a very bad virus so I decide to restore the whole system. t's a HP computer with backup already made on it. How to install just pure windows 7 on it? I don't have a copy so I have to remove each unnecessary tool from it? What version of Windows 7 I should put on my computer? 64? 86? How to make backup of the whole system at that point? Can I make multibootable menu for Windows/Linux? If yes, which Linux I should install? Thanx!