I have been running XP and Ubuntu, dual booted from separate hard drives using GRUB2 boot loader. No problems.
I wiped XP and successfully installed Windows7.
A problem has arisen in that whilst GRUB still boots Ubuntu OK, when I select Windows7 from the GRUB memu I get the Windows option to 'fix start up problems' or 'start windows normally'. None work.
I am fairly sure I have some sort of MBR problem. Under XP I could get a terminal via the install disk and just "fixmbr" and all was well.
Following the same procedure in Windows7 gives me an X:> prompt. fixmbr doesnt work.
Can anyone advise please how to fix the MBR in Windows7 ?