For awhile now, I have had 2 drives, 200GB Windows XP Pro (main drive), and a (i think) 4gb Linux Ubuntu Drive (secondary). Never set anything up, everything worked by itself, user switching and all. I don't want to use that drive anymore, so I removed it from the computer and rebooted and a black screen came up saying loading grub something (i forget) and also Error 12 after that.... I put the drive back in, and it's back to normal?? Any ideas, fixes etc?