If it occurs that you are moving the portion of the page viewed instead of the cell selected in Microsoft Excel with using the keyboard arrow keys, do not panic – the issue is pretty simple and can be solved without the need to restart your computer or your Microsoft Excel program. 
Open the On-Screen Keyboard, and uncheck the ScrLk (Screen Lock) key, and you're done ! You can then go back to your Excel marketing formulas as usual and switch from one to another using your keyboard arrow keys.
See a full walkthrough on how to lock the screen move while using keyboard arrow keys and get back to switching Excel current cell with the keys: https://www.ybierling.com/en/blog-officeproductivity-excelkeyboardarrowmovingpage