I have Windows 7 and am wondering how good it is? I've never used it before. I actually don't have a Windows installation disk and I'm worried that if I'm unable to boot the computer that I would be able to recover from the backups made by the built in utility, for example Microsoft says "If you can't access Control Panel, you can restore your computer using a Windows installation disc or a system repair disc (if you have one). " can the built in utility make a repair disc? Would I be better of buying a backup program like Acronis true image?