I made a thread a while back asking about the black box covering the right side of the screen with DWM forced off in 8.1, and a user helpfully showed me that it could be removed by renaming Windows.Shell.Search.UriHandler.dll and Windows.UI.Search.dll. I'd now like to remove a small black box that's appearing in the top-left corner of the screen with DWM off. It's not there if I disable DWM before I do anything on the PC, but it sometimes appears if I disable DWM later. I don't know what the trigger is. Restarting winlogon.exe doesn't help, and the problem can only be resolved by restarting the PC. Anyone know how I can fix this? I'd like to be able to disable and enable DWM freely without having to restart the PC all the time.