I have a PC that reboots when there is activity required of it. It always reboots when asked to install windows updates.
The event viewer gives ID: 7000 and the source is Service Control Manager. Explanation is " The exusb.sys IME control unit (GPUD) service failed to start due to the following error: The service cannot be started either because it is disabled or because it has no enabled devices associated with it.
This workstation has been in use for over a year with no problem and now reboots whenever there is a demand on its resources.
I replaced the onboard video with a AGP 128MB card and no change. This is a business system and I hesitate to reformat because of all the networking and business applications needed to reinstall.