If you select files, choose "Compress to ZIP," and then try to add a password afterward, Windows will create the ZIP first, and if you attempt to add a password later using a tool like 7-Zip, it often creates a second ZIP inside the first one. The outer layer is unencrypted.
While Windows 11 excels at many things, it has a surprising limitation: its built-in compression tool to a ZIP file . While you can "Compress to ZIP file" with a single click, that file remains open to anyone who finds it. password protect zip file windows 11
This method uses , but note: it only works if you compress the files using File Explorer and set a password. It’s not as strong as third-party tools, but it’s quick. If you select files, choose "Compress to ZIP,"
7-Zip is widely considered the best choice because it is free, lightweight, and supports high-end encryption. While you can "Compress to ZIP file" with