Any advice welcome please and apologies for my lack of knowledge! My PC has suddenly stopped working. When it's switched on, the logo screen appears with 'TAB TO VIEW POST SCREEN, DEL FOR SETUP', the next screen is a lot of data that I don't really understand, then I get the message 'NO HPA READY DRIVE, INSERT SYSTEM DISK'. I don't have a system disk for Windows XP which is its operating system. What can I do? I do have a recovery disk for Windows Vista which came with a laptop - can I just use this instead?