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Microsoft Windows 7

7z – “unknown method” or “unknown compression method”

This post containse the steps to fix the error messages “unknown method” or “unknown compression method” with 7 Zip

Solution to the errors: “unknown method” or “unknown compression method” with 7 Zip.

When you try to extract a .7z (7-Zip) file show the following errors:

unknown method

Or

unknown compression method

Solution:

Download and install the latest version of the 7-Zip software from

7 zip to solve unknown compression method error
http://www.7-zip.org/download.html

Did my solution solve your problem? Leave a reply.

39 replies on “7z – “unknown method” or “unknown compression method””

Thank you thank you thank you!!! Spent the whole day searching for how to fix my problem! Really helped a lot!!!

Thank you for yout comment. Next time that you’ll receive an error, I suggest you to copy the error message directly from the error windows (Ctrl+C) and search on Google. The idea of my website is offer a solution to an error message.

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