Final answer:
To solve the issue where Microsoft Excel can't insert new cells, check if the sheet is at its cell limit, if there's restrictive formatting, or if data extends to the last row or column. Remove or resize tables or arrays, clear unused rows or columns, and unmerge any merged cells. Familiarize yourself with Excel, and seek further assistance if needed.
Step-by-step explanation:
When Microsoft Excel indicates that it cannot insert new cells, it is often due to the worksheet being full or cells being restricted by formatting or data. Before proceeding, first, save your work to prevent data loss.
Start by checking if your sheet is at or near the Excel limit for cells, which is 1,048,576 rows by 16,384 columns for Excel 2007 and later versions. If you are near this limit, you might consider moving some data to a new worksheet.
If the issue isn't caused by Excel limits, then it could be due to the worksheet format. Look for any tables or array formulas that extend to the last row or column, and remove or resize them if possible.
Another step to take is to clear any unused rows or columns that might have hidden formatting or data. To do this, select rows or columns, right-click, and choose "Delete" to clear them completely. Finally, look for any merged cells, which can cause issues with inserting new cells, and unmerge them if necessary.
Remember, persistence and familiarizing yourself with Excel's functionality are key to managing and solving Excel problems. If these steps do not resolve your issue, consider seeking assistance from online resources or forums dedicated to Excel troubleshooting.
Learn more about Microsoft Excel Insert Cells Error