Whenever I try to shutdown my Windows XP machine, I get a blue screen with the error message "DRIVER_IRQL_NOT_LESS_OR_UNDEFINED" and that Windows has shut down my PC to prevent damage etc. It blue screens about 3 seconds after the words "Windows is shutting down" appear. This seemed to happen after I installed Insektors, which is an app that allows you to play bootleg games. I uninstalled it from Add/Remove programs, but I still get blue screened whenever I shut down. Any ideas?