Ok,I have read the other posts on this subject and they seem to pretty much cover this but I'm hoping someone can dumb it down a bit for me. sorry I cant be a bit clearer on system specs but I'm on my laptop at work: On my desktop pc I have just had a new processor(pent 4,3.2ghz) put in and new dual ram(1.5 gb in total).my mother board is now an asrock(not sure of model but cost about £80 i think.also had nvidia 6600 graphic card put in and a new power supply(400w?).I have a maxtor hd(18g) and another hd thats 80g but I cant remember the make or model.just got a new monitor(benq 17fe+)and new keyboard(microsoft pro). also my cdrom drives gone and now i have dvd and dvd/r. Think thats everything. was working great until today came back from shopping and pc had turned of,when i went to reboot it took ages and was un responsive when i reached desktop.tried to reboot several more times and it would get as far as the "hit f2 for setup screen" and it would say "disk error". Its come up with a few messages that say things like "no boot device"ect.it said hit f1 to continue but all i got was a strange sound from my harddrive. The maxtor drive was the last part of my original pc,if this is faulty could i just have the 80 gb hard drive?I dont realy want to spend any more cash on my pc if I can help it!