no i dont have a disc, i was going to try a bootable usb ubuntu. i read about it on here. nothing seems to be working. i think somehow the hard drive has been removed from the software. it has two sata and a cd drive. the other option is to remove the hard drive and put it in a hard drive caddy attach it through sata connector and try that. though i have two lots of memory, two lots of 400GB. am i being daft in thinknig that these are two hard drives or are they just memory. im thinking they are just memory, if someone could just confirm that. also, without taking apart the computer, what size is the hard drive usually, is it a standard thing or do they come in different sizes. this is for the caddy. £4 including postage, not bad as i dont want to loose any of the stuff on my computer.