This is a long one.
I had Ubuntu on my computer for quite some time, before deciding to rid it from my hard disk. Withoutmuch prior knowledge of GRUB, I stupidly decided to delete my entire partition of Ubuntu. Of course I got Error 22, figures out how to fix it, and... Messed it up again.
I accidentally went through part of the setup sequence for Windows 98 before realizing that I didn't have to do this to fix the MBR/GRUB problem.Oops. Now when it loads up, only an "Invalid system disk Replace the disk, and then press any key" error appears.
Windows 98 won't install, neither will Windows 7, nor can I format the hard disk using the FORMAT command, or anything else I can think of. At this point, I DO NOT care about the files on my hard drive, intact I'll end up formatting it anyways later.
Thank you for your time, help, and consideration.