System won't boot up, just gives grub rescue> prompt..
Hi, I just installed Ubuntu 10.04. After I installed it, I restarted my computer and ran Windows 7. Later, I turned off my computer and found that the next time I turned on my computer, and every time after that unless I have the Ubuntu disk in my drive, I would get the message: ERROR, boot file not found (or something like that, sorry I don't care to restart my computer to read the exact words). Then it gives a prompt that says: grub rescue>
I'll keep it short and sweet, what the heck do I do?