hello. i have a computer that i wanted to wipe clean and reinstall windows 7. after i ran killdisk and it completed, i then put in the windows 7 cd. the computer did not load up and an error came up that says "reboot and select proper boot device or insert boot media in selected boot device and press a key" when i put killdisk back in it says that my drives are allocated so i figure that the computer is not detecting my drives? can anyone please help me? thank you in advance!