Since the 7zip is absolutely free of cost, you can download it without paying a single cent from http://www.7-zip.org/.

FYI: 7zip archives have .7z extension.
Once you have downloaded, you can follow the steps given below to install the program on Windows 8/Windows 8.1 computer:
- Log on to the Windows 8/Windows 8.1 computer using the administrator account.
- From the Start screen, click the Desktop tile.
- Once on the desktop screen, locate the downloaded 7zip installation file.
- Double-click the located file, and follow the on-screen instructions to successfully install the program on the computer.
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- If needed, restart the system in order to add the 7zip option in the context menu of every object.
Note: Since 7zip is a versatile application, it can also decompress the files that have been compressed using any common compression tool and has compressed the files with .ZIP or .RAR extension.
Related resources
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