Hi, This morning a fan in my case was making strange noises (either CPU or GPU fan I think) and so I turned my computer off. I turned it on a little later and the computer was making a really odd clicking noise, so I unplugged each harddrive in turn to see which was causing it. I removed the problem drive (not the one with my XP installation on) and then turned the computer on again. This time it just said could not detect boot disk. I've tried installing XP again, but it gets as far as loading all the setup files and then my PC reboots. The bios still detects the harddrive still in. The harddrives are just normal IDE 120gb drives (the removed one is a Maxtor DiamondMax Plus 9 and the one still in is a Barracuda Seagate). I don't understand why the first stopped working (it is at most 6 months old) and why the 2nd one's installation is not detected (it is only a month or 2 old). Up til today, my computer was working perfectly. At the moment my whole computer is useless and the fan is still making the same weird noise occasionally. Thanks.