What do you have attached to the machine that would also be in use when the video card is active (playing games, audio, etc.)? DirectX accelerates more than video, and so it could be one of the other devices with kernel-mode drivers too (network or audio, for instance). For example, ndis.sys is 4th in the list, which would indicate network activity at a decent rate at the time of the issue. Using Killer wireless maybe? Or certain wireless cards? Without your system specs from the ETL I have to take a shot in the dark here, but I'd wager your problem is network-related, not video.