i have an hp laptop with windows 7 installed that has recently started running really slow. Its gotten to the point where it wont even open programs. I want to completely wipe the hard drive, os and all, and install linux. My problem is that i dont know how to wipe a computer without booting a program from a cd drive. My laptop has a broken screen and i can only see the screen when its on the windows log in screen. is there anything i can use to wipe the hard drive after logging on to windows?