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 users, follow these two easy methods to reduce data entry time and errors when customized features aren't available.

When entering data in Excel, always enter top to bottom, left to right. Because Excel is, basically, an accountant’s ledger sheet, the bookkeepers always enter numbers top to bottom.

Spreadsheet software is supposed to make life easier, not torture you with endless hours of data entry. Before you curse Excel and wish that you were working back in the good old days of paper ...

Select the Web data in your browser, copy it from the browser, and paste it into Excel. Alternately you can try dragging and dropping the table from the browser into the worksheet. To drag-and-drop ...

The use of a data-entry form makes data entry faster and more efficient because you don’t have to go to multiple different cells to enter data, row by row.

If you identify a data field or a range of cells in your worksheet as a date entry, your spreadsheet can easily convert back and forth between numerical and text representations.

Not everyone is familiar with Excel. You can protect the data input process by using Excel's UserForm object to collect data. Susan Harkins explains how.

Adding a drop-down list in Excel is a quick and efficient way to choose predefined data. Here's how to create a drop-down list in Microsoft Excel.