

Unfortunately, this doesn’t save the program from errors and unexpected issues. With over 30 years of experience, it is easy to think that Microsoft Excel is close to perfection. It has been around for decades and is the go-to program for professionals and students. Microsoft Excel is one of the best spreadsheet software in the world, with tons of various tools for processing and analyzing data and numbers. Browse to the folder where you store your Excel files, select Subfolders of this location are also trusted, and click OK.Do you see a ‘This file couldn’t open in protected view’ error in Microsoft Excel?

In Excel, click File » Options » Trust Center » Trust Center Settings » Trusted Locations. Method 2 (by folder): This option is better if you usually store your downloaded Excel files in one folder. If you don't have an Unblock button, use Method 2. This option is available for some file types, but not others.

Once you unblock a file, Windows should remember and Excel should not ask you again. At the bottom of the General tab, click the Unblock button. Right-click the file and select Properties. Method 1 (by file): Before trying to open the file in Excel, find it in Windows' File Explorer. To work around this problem, you need to answer the security prompt before Microsoft Excel tries to display it. Security warnings typically come for files you downloaded from the Internet, but not always. Excel is trying to display a security warning about the file you want to open, but for some reason it is unable to. The actual problem has nothing to do with disk space. The same thing happens if I double-click an Excel file in Windows' File Explorer while is open in Excel.

When I have open, and try to open a file using File » Open in Excel's menu, I get this error: "Microsoft Excel cannot open or save any more documents.
