My PC has had a lot of Disk Boot Failure issues over the past few days and I have tried some things, such as scanning for viruses, malware, deleting programmes that just sit on my desktop doing nothing. None of those seem to have done anything, yes I have been able to get to my desktop on rare occasions after numerous booting attempts. The problems started two days ago. I turned my PC on and when I came back to expect to see my desktop there it was, the Disk boot failure error. In the past I have seen this message a lot, but we replaced parts since then and I haven't had this message at all after that. Now a good few months later here it is, again! I have tried using my disk to boot it, but most of the time it just slows down and doesn't get anywhere past the screen (windows 7 screen just before desktop after 'starting windows'). Also my PC is slow when i actually get onto the desktop (at times not all the time, sometimes programmes cause it to lag/slow down/crash). A friend thinks this may be a hardrive problem, perhaps even a memory problem. It isn't the same message all the time or sometimes it doesn't even get to the same points before seeming to crash on me. I'm not a brainiac when it comes to this sort of thing, is there a way i can check my computer's memory while the PC is on? Sorry if this seems no help, I may have to take it to a computer shop.