You can password protect an archive or zipped file. WinRAR, the go-to compression app for Windows users supports password protection. You can add a password to an archive when you create it. When you extract the archive, you will have to enter the password before you can get to the files inside. If you want to add a password to an existing WinRAR archive, you might think it’s impossible. The obvious way to add a password to an existing archive is extract and compress it again. You can add the password when you compress it. There is however a much easier way to add a password to an existing archive using WinRAR. You don’t need to extract it or anything. Here’s what you need to do.You need WinRAR installed on your system. Right-click an archive and select ‘Open with WinRAR’ from the context menu. Go to Tools>Convert archives. Alternatively, you can just tap Ctrl+Q.
How To Add A Password To An Existing Archive