why I keep getting this error?

DirectX function "GetDeviceRemovedReason" failed with DXGI_ERROR_DEVICE_HUNG ("The device is hung which is typically cause by issues in the graphics driver or alternatively the application"). GPU: "NIVIDIA GeForce GTX 660 ", Driver: 34052

I have updated all drivers. Windows 7. High settings, not ultra. 3.8 ghz six core, 8 gb ram.