Use a tool like Windows Defender or Malwarebytes to check the archive before opening it.

Essentially, this is a "box" containing a collection of images or videos meant to show you what a piece of software or a specific digital theme looks like before you install it. Why do people use .7z instead of .zip?

While almost every computer can open a standard .zip file, many enthusiasts prefer because it offers a higher compression ratio . This means a large gallery of high-resolution screenshots can be shrunk into a much smaller download, saving you time and bandwidth. How to Open SS-Prevs.7z

A popular choice for macOS users who need to extract 7z files. Safety First