In this case, the files may be generated incorrectly, and some features may not work properly when you open the files in Excel. If this occurs, test the features in new files outside the third-party application.

Recover a corrupted workbook manually when Excel can't start File Recovery mode automatically and learn about saving backup and recovery files to prevent losing your work.

Having a problem with your Excel? Check this page for recent issues that we've discovered, and what you can do about them.

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows.

To help you resolve this, try the solutions below. We've listed the most common solutions first so try the steps in the order they're listed. Make sure Office is updated to Version 2102 (Build 13801.20808) or later. If you're not setup for automatic updates do the following:

When you try to open an Excel workbook, a Word document or a PowerPoint presentation with Excel, Word, or PowerPoint, you may get an error, and this article explains what to do about it.

Find Microsoft Excel help and learning resources. Explore how-to articles, guides, training videos, and tips to efficiently use Excel.

Find out how you can unlock an Excel spreadsheet when you are locked out of an Excel file by yourself or by another user.

Any workbook, template, or workspace file that you place in the XLStart folder is automatically opened when you start Excel. To find out the path of the XLStart folder, check the Trust Center settings.

The file is a Word or Excel file containing ActiveX controls. You're trying to co-author an Excel workbook that uses an ISO strict version of the Excel Workbook file format (.xlsx).