On an old Dell system with a USB keyboard. XP keeps losing its keyboard drivers. I can go into device manager, reinstall and reboot, but after a while, maybe a reboot or two later, they disappear again (yellow exclamation mark next to "HID Keyboard device" in device manager). What could be the problem?
hopefully you have the disk to repair install the operating system. Or try a USB keyboard, the system files have been corrupted. might be caused by a bad system update or malware that got into the system. Try a system scan too.