This guide will show you how to password protect a ZIP file. This can be a secure way to send files to another person over email or other electronic means.
On your Desktop put the file you wish to password protect.
Right Click on the file and scroll to 7-Zip and then to Add to Archive, on the right of the box is a box with Encryption enter your chosen password and then reenter and then click OK.
Now right click on the new Zip file, go to 7-Zip and scroll to extract here. It should now ask you for a password, enter this and you should now how your file again.