A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The automatic scrolling is usually caused by a game controller being connected to the PC, if you have a game controller connected to your PC, disconnect it and restart your PC.
If there is no game controller connected to your PC or that does not resolve the problem, then the best option is to perform a full repair of your Office installation.
Open the Settings App.
Go to Apps, then scroll down to find Microsoft Office
Select that and choose Modify - Online Repair
That should fix any issues with your Office Installation.