My computer is an Hp (i don't know the model) and it's running on Windows 7. I want to completely wipe everything, without having to have any previous state of the computer. I want it jst as it was when i bought it, everything wiped and i can re-install anything that would be lost like MP3 Rocket and iTunes and whatnot. i'm backing up what i can onto a usb but i really don't care, i just want my computer fixed. Any help please?