If Excel is not opening on double-click or not responding on your Windows 11/10 PC, take a look at the addons first, or else follow these suggestions to resolve the issue.

I have a 13 MB file that opens fine in Excel 2000. It's approximately 100 sheets, with each sheet having in the neighborhood of 256 columns and 100 to 250 rows. A lot of work went into creating ...

If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.