Just recently after installing Mental ray and new detonators, Maya (4.5) seems to hang on closing down, the computer doesn't hang, only Maya refuses to shutdown, i can shut it down via the 'task manager' but this only leaves me with a blue screen to deal with on shutdown, the error is----- STOP (00000000,00000002,00000000,0xe1993a7f) IRQL NOT LESS OR EQUAL Could this be a driver issue? Any help greatly appreciated thanx -------------------------- o/s Windows 2000 professional VIA motherboard (latest 4in1 adapters) installed pIII gig 256 ram geforce2 3d prophet gts 32mb Soundblasterlive 5.1