If you Can't type numbers or formulas or enter data into Excel cells then it might be a problematic Add-in causing the problem. Here are some working fixes that may help.

Microsoft Excel is one of the most powerful and flexible computer programmes in the world. With these tips, you can become a true Excel wizard.

How to Activate Focus Cell Before Microsoft added Focus Cell to Excel, I would click the row number or column letter to ensure I was reading or adding data to the correct cell.

Why Is Custom View in Excel Disabled?. Computer programs frustrate users when something that worked before stops working, especially when there is no clear indication as to why.