Windows/Windows Server 8 + Faulting application name: dwm.exe + nvumdshimx.dll

If you are running Windows 8 Consumer Preview or Windows Server 8 something like a Lenovo T410/T420 with an NVidia graphics card you may have come across this issue and an Error 1000 in the Application section of the Event Log.

I think I first encountered this when remoting in to both Windows 8 and Windows Server 8. But it was only when I opened a PDF in the Windows Metro PDF viewer that I saw the screen flickering black, and got kicked off to the logon screen.

Here are a few helpful links on the subject:

• http://answers.microsoft.com/en-us/windows/forum/windows_8-hardware/nvidia-is-broken-when-running-metro/97f26d8d-d70b-4b85-8409-6a4cba43a80b?tab=MoreHelp
• http://forums.nvidia.com/index.php?showtopic=224728
• http://www.istartedsomething.com/20120407/workaround-for-windows-8-metro-apps-crashing-with-nvidia-beta-driver-for-dual-gpu-users/

The simple workaround (via the last link):

1. Desktop > Right Click > NVIDIA Control Panel > Manage 3D settings > Global Settings > Preferred graphics processor: Integrated graphics.
2. Disable your non-Integrated device, which in my case is: Device Manager -> Display adapters -> NVIDIA NVS 4200M