Some issues like laggy screens or blocks of black covering Office Application windows can be fix by disabling Office from attempting to use Hardware Acceleration 


Disable Hardware Graphic Acceleration from within Office Application

  1. Open any Office program like Word. Click the File tab and then choose Options in the left pane.

  2. Select the Advanced tab. In the right-hand pane, scroll down to the Display section and check the box that says Disable hardware graphics acceleration.

  3. Click OK to save the settings and restart your PC. After making these changes, the system will automatically turn off hardware graphics acceleration on all the other Office programs like Excel, PowerPoint, Outlook, etc.