Hi I am new and have to say not too great with computer hardware so please bear with me and apologies if I'm posting this in the wrong part of the forum. Basically my problem is-I had a computer technician come to look at my windows xp computer, it was running a little slow and making a bit of noise but nothing else at all wrong with it, I just wanted him to speed it up a bit and make it a little quieter. Really wish I'd not bothered as when I came to switch it on the next day after he'd been I got a disk error message and it just wouldn't load windows at all. Of course I immediately knew it wasn't anything I'd done as I had only used it as normal so it was either the technician or sheer weird coincidence. Anyway, he stated he restarted (or rebooted is that what you guys call it?) the computer after clearing some files and some other stuff but then went on to clean the CPU cooler presumably whilst it was still on? (I didn't watch him do anything, I stupidly left him to get on with it as I don't know anything about what he'd be doing round the back of the computer anyway). Then he left it to defragment-he did not restart/reboot the computer again to check it restarted. When I got the error message the only screen I could get up was a technical screen which didn't mean much to me but I do remember it saying "CPU fan speed-0." The computer did work for the afternoon and evening after he left but it had not been restarted. When I switched it on the following day it was wrecked. Had to have the hard drive replaced and basically the whole computer reset to factory settings (by another company) and it was expensive. All I wanted was for it to be a bit faster and less noisy didn't expect it to get ruined! Now I know not to fix something if it ain't broke. What I want to know is if this guy was at fault by cleaning the CPU with the computer still on (he's claiming he wasn't as it was working when he left but he had not checked if it restarted ok) and if so how come we needed a new hard drive as opposed to a new CPU which he was cleaning and I think he wrecked-is the hard drive next to the CPU? (yes I know nothing about hardware!) Or do you think it's just a coincidence the hard drive was wrecked? Thank you very much.