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. How to Extract .7z.001 files - Microsoft Q&A
: Randomly generated names are often used to bypass basic signature-based detection. Unimportant_Rapping_Jackal.7z.001
Files with randomized names like "Unimportant_Rapping_Jackal" are frequently found in: You can use 7-Zip on any computer, including