What is 7-Zip?
7-Zip is a free file compression and encryption tool, it can be used to compress individual files or folders.
7-Zip can be downloaded here. Download (7-zip.org)
Once installed on a computer follow the steps below to compress and encrypt the zip file
Make sure you know the location of the file or folder you wish to encrypt
Then click on the start menu and type the number 7
You should then see 7-Zip File Manager as an option - Click on this
Navigate to the file/folder you want to encrypt - Select it then click Add (Big green + button)
It will then give you some options
Change the name if you wish
Change the archive format to Zip
Enter a password in both boxes
Change the encryption method to AES-256
Then click OK
The zip file will then be created
This will create a single file with the files/folders in it and require a password to extract them.