I have a new Dell computer that has Windows 7. I bough a new 500GB drive for it, so now I have ~1TB.I have reinstalled and formatted the drives multiple time (trying to install Linux distros). I want to have Windows 7, Ubuntu, and Backtrack 4. Right now I have Windows 7 and Ubuntu on the 1st drive and Backtrack 4 partitioned on the 2nd drive. I was in Windows and I rebooted and I get a message saying "No Module Found. Aborted. Press Any Key" Then after that it says "BOOTMGR is Missing. Press Ctrl+Alt+Del to Reboot." I tried reinstalling GRUB2 usuing an Ubuntu live CD. I got GRUB reinstalled and now I could access any of the partitions. So I went into Windows and rebooted later and the same message came up again. What do you think keeps happening? Does something keep overwriting GRUB? If Windows was overwriting it, wouldn't it rewrite the Windows MBR?