GRUB fails to boot any OS
I am inexperienced in using Linux, and just installed Ubuntu 10.10 on an external hard drive. I didn't want to mess around with re-partitioning my hard drive, which has Windows 7. I figured that I could just run Ubuntu from the external, and if it gave me any problems with Windows, which I unfortunately need for work, I could just unplug it and boot normally. However, GRUB appears to have installed some component to the local hard drive. Whenever I try to boot from the local hard drive, I get this error message:
"error: no such device: 8b84f351-7770-4908-b12f-0cbd31bc3662
grub rescue> "
Another thing is that in the boot menu, only the CD/DVD drive and local hard drive are options, it won't even register the external.
Any suggestions on what may have caused this error? I saw from other posts that GRUB doesn't like multi-drive systems. Also, would it be possible to delete GRUB from my system, then allowing Window's MBR to take over? Thanks for any help.