I am working on my friends Dell and it has a dead hard drive. The product key is rubbed off the COA sticker. He has no recovery disks that came from dell and he has no home made recovery disks made from the computer. I know the BIOS is locked to a product key for a particular copy of windows. Is there a way to extract the key from the BIOS? Or a way to find out which version of Windows was installed? Will any Dell windows cd work?