A: 4K â also known as UHD (more on this in the next answer!) â is a picture technology that quadruples the number of pixels found in a full HD picture. These pixels are usually arranged in a 3,840 x 2,160 configuration, compared with the 1920x1080 you get in a full HD TV.
Files with the .7z extension are very similar to Zip files. These files are compressed archive files, usually created by the 7-Zip file archive utility. 7Z files can make it easier to send files and folders over email and the Web.
Add a password. On the right side of the 7-Zip window, there will be two fields to enter and confirm a password for the file. You can also select your form of encryption, and whether or not you want the names of the files encrypted as well.Click OK when you are done.. Create the compressed file. Select the folder that you want to password protect. Right-click and select 7-Zip from the menu. From the second menu, select âAdd to archiveâ¦â This will open 7-Zip.