I was working on my friend's computer and I had to switch the hard drive over to his new computer to try and get it to work on the new computer. It didn't work, so I tried to put the harddrive back in its original computer and now I have a problem. When I try to start up the computer, everything runs fine through the POST and then, before it goes to the Windows screen with the little bar that goes sideways, it stops on a black screen with the blinking underscore (_). I've restarted it many many times and it all ends up the same, stopping at the flashing underscore. I've tried to boot to a Win 98 boot floppy to get it to the command prompt but I get an error saying that it is the incorrect disk. I've also tried to reset the bios by taking the battery out for a while. It reset the bios good and all but I still got the same problem. I think it has to do with the MBR cause I know the harddrive works (as a slave in another computer) and I know the RAM is new. I don't think those are the problems because before I put the harddrive in the new computer to try and boot off it, it worked fine. I can't get into the start up menu either by pressing F8. The only thing I can think of that might work that I haven't tried is to boot off the XP cd and do the recovery console thing. Unless I know that it will abosolutely fix it, I'd like to stray away from it. If you think otherwise, I'll gladly try it. I think I had a problem like this before and I got past it somehow, but I don't remember how I did it. Any help would be greatly appriciated.