My brother's computer won't start Windows 98. It starts in DOS with an a prompt. I tried to switch to the c drive (c: ), but it was an 'invalid drive specification.' The restore disk doesn't work, because it can't seem to find the c drive. I would rather not format the hard drive, but I have no clue what to do when I can't even get to the c drive! I've used techspot a lot to look up computer problems before, but I haven't been able to find how to deal with this, and any help would be great!