You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip.

: Use official tools like 7-Zip to open it.

Be cautious when opening unexpected .7z files. Malicious actors sometimes use archive formats to bypass email security filters.

: A package of high-resolution images, brand guidelines, or design assets (given the high compression efficiency of .7z for mixed media).

: Use security software or tools like VirusTotal to check the file.