HP Pavillion t3000 desktop PC automatically restarts after immediately shutdown

Had a strange problem the other day, the PC was shutting down and then rebooting straight away. So the poor PC owner was waiting until the exact momment between safe shutdown and restart to power off the PC. After a little digging, that did not turn up much from the event log etc, I decided to turn off the windows feature that automatically reboots the machine after a critical error occurs. This can be found under control panel, system, Advanced tab, Startup and recovery options. With this in place, a shutdown revealed a STOP error on a BSOD. "STOP 0x000000D1 IRQL_NOT_LESS_OR_EQUAL Kbdclass.sys" Error Message When You Try to Shut Down the Computer So now it was quite obvious that the mouse driver need upgrading because it happened to be a logitech mouse. Problem solved ;)