I dont know what OS you have, but just do this. Go to Windows help area, and then type in Scandisk. It should tell you how to access it on your OS. If it is Windows ME, then go to system tools under accessories, otherwise, do the help thing above. GL!
No idea, Windows errors are a pain in the ass, and I don't knwo 1/53589234589 of them off the top of my head. Just call up HP, and they will send you recovery disks for your PC, then, problem solved. GL