system memory dump at shutdown Win2000

Everytime when I shutdown my notebook running Win2000, I get a blue screen with the following messag:

System memory dump
***stop:0x0000009f(0x00000100,0x812d3620,0x812D3620,0x81483910)
Driver_power_state_failure

To power down I have to remove AC adapter and battery.

Anyone any idea.

Thanks

Ruud