Hi @Roger Novak
Via online search, some third-party software may cause problems when using Office. It is recommended to try a clean boot.
Besides, as there is no "Disable Hardware Acceleration" option in Office, I suggest you go to Start> Settings> System> Display> Graphics Settings > Select: Desktop app > Use the Browse button to add Excel.exe > After you’ve added Excel, select: Options > Use the Power Saving GPU: Microsoft Basic Render Driver
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