You can make Excel always open old spreadsheets in Protected View. Enable or disable Protected View using in-built setting, Group Policy, Registry.

Key Takeaways : Excel spreadsheets can be protected by Edit Ranges, Sheet Protection, Workbook Protection, File Modify Password, VBA Project Password, and File Open Password.

Microsoft Excel has several features designed to help you recover unsaved versions of files and prevent data loss.

It is possible to create a macro in an Excel sheet that unlock the sheet which is already protected by a password. Users can easily prepare a document in the sheet and then lock it again with a ...

Learn how to unprotect Excel sheets or workbooks without a password using this simple step-by-step guide. No software required!

How to Open an XLS File in Excel. XLS files are Excel workbook files created in Excel 97 or Excel 2003. The 2007, 2010 and 2013 versions of the program use the XLSX format by default to save ...

However, if you open a protected Excel file in the browser edition, you can see hidden formulas, but you can’t modify them. For most sheets, hiding formulas is overkill but easily implemented.