<br /> Use a Microsoft PC regularly? Chances are, you have some Excel docs you'd rather keep private.<br />To keep those hush money payment funds private, Digital Trends suggests adding a password.<br />Step 1: In Excel, open the document you want to secure with a password.<br />Step 2: Click “File,” “Info," and “Protect Workbook” button. Then select “Encrypt with Password.”<br />Step 3: Type in a password that’s complicated and unique--and remember the password!<br />If you forget it, you'll lose access to the file. <br />