It was 3:47 AM when Leo stumbled upon the link.

It is to compress a full version of Call of Duty: Modern Warfare 2

Even if a file is legitimately compressed (e.g., to 7 GB), the "unpacking" process can take hours and put extreme 100% load on your CPU and RAM.

Call of Duty: Modern Warfare 2 (2009) is a massive game that originally required approximately of disk space. To shrink a 12 GB game down to 40 MB would require a compression ratio of roughly 300:1 .

Before opening the setup file:

Before downloading the game, make sure your PC meets the minimum system requirements: