My computer recently just stopped working, after installing C&C Generals, i went offf to eat while it installed, and it came back with blue screen "IRQL_NOT_LESS_THAN_OR_EQUAL_TO", i tried to reboot in safe mode but bleeps said graphics card was faulty. I tried my graphics card in a different PC< and it was fine. Anyway, I bought a new graphics card (and motherboard as i wanted pci express), and now the system boots but I get the "Error loading OS" message. With my previous Motherboard this often happened becayuse the BIOS changed the hdd boot sequence, but I checked this and it was fine. I have tried to reinstall windows, but I put in the cd, set CD and first boot device, and it says booting from cd... and nothing happens. I have made a floppy boot disk, and tried to format the hdd, by typing format c: /s /v and just format c: but it says bad command... etc. With no way of reistalling windows or running the cd from DOS, or formatting my hdd i am completely stuck for ideas on how to sort this out. Can anyone help me? Also, since FDISK also wont start from the prompt, somthing could be up wiuth DOS I made the boot disk from a comptuter using XP home PC, while i am using pro. Could this mess about with DOS?