If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

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

One of the most notable additions to Microsoft's 2007 Office System was the Trust Center, which centralizes the security options in Word, Excel, Outlook, PowerPoint, and the other applications in ...