First let me state that Im in the process of installing the XP Pro upgrade OS into my cpu. I tried using the XP boot up disks and when it finally prompts me to insert my XP Pro disk into the CD drive, my drive lights up and my hard drive light up in 10 second intervals about every 40 seconds. I let it run for about 30 minutes and nothing was happening. So... I decided to use my Win 98 boot up disk. I tried the FDISK command and I get the "cannot find hard disk" failure prompt. I know my A: drive works and my HD is found in the BIOS. Can anyone give me some advice. I've never had this kind of problem installing an OS.