I have an old ibm machine at home and it has like a 6.4Gig HD on it and it originally came with windows 98 on it. I wiped the hard drive and installed windows xp on it but now it will not shut-down properly. It acts like it's gonna shut-down properly and then a screen comes up saying that it is now safe to turn your computer off and then I have to flip the switch on the back of the PSU. Is there any way of fixing this? The computer came with one of those IBM Aptiva recovery disks which has the windows 98 on it so maybe i cannot install anything higher then 98 on it?