Why? Compressed games use cracked .exe files and memory patchers. Defender will falsely flag these as "Packed.Vmpbad" and delete them.
Even with a compressed file, your PC still needs to meet these specs to run the game on Windows 10: Windows 10 64-bit
Since the technical feasibility is non-existent, what exactly are these "500MB" files found on the internet?
Downloads promising the full game in 500MB often lead to serious security risks:
