i have a old computer that has no operating system. when i put a cd in the disk drive it wont let me install windows 98. so i put that hard drive in a different computer and installed windows 98 starting from that computer, and it worked, but when i put that hard drive back in my old computer it says disk i/o error replace the disk, but there is no floppy disk in the drive, please help (i dont want answers like: dump it or just buy a new computer)