System: Dell 5150 WinXP Media SP2 No PS2 ports Problem: System won't recognize USB keyboard and mouse so I can do repairs on WinXP problem Yesterday, I got an error message telling me that the driver for my tablet was invalid. I wasn't using my tablet at the time, and plugged it in. It worked fine. I unplugged it and figured I'd update the driver later that day. Went away from the computer for a couple of hours. When I returned, everything was operating in slow motion (took 8 minutes to open Start/All Programs Tried to start the computer in Safe Mode and got bue screen with the following error message: "Stop: c0000218 Registry Failure..etc" Went online and found a MicroSoft fix which involved copying system, software, sam, security and default file to a tmp folder, deleting them, then copying them from a repair folder. I got through that and restarted the computer as instructed and then my USB keyboard and mouse stoppped working. I have tried rebooting from the Dell Win disk. I get to the point where it asks me to accept the license by pressing F8. That key does not work. Strangely. the ESC and the PgIp/PgDn work just fine. I got the bright idea to copy all the USB driver files (c:/windows/system32/drivers/) from another computer with a clean, recent install of WinXP Media but still no luck. I am guessing at this point that I have to go in and edit the registry, but I have no idea where to start. The only really good news is that I can read the drive. I took it to another computer and installed it as a secondary drive and backed up all the data files to an external USB drive that I use for backups. So at least all my critical data is safe. help!!