A: Not directly. It is a standalone program, not a wallpaper. However, you can use tools like Lively Wallpaper or Wallpaper Engine to run the .exe file as your desktop background, though this may vary depending on the version.
If you want, I can: (choose one)
While Chilled Windows itself is a "joke" program, many antivirus software packages flag the .exe versions as malware because they simulate malicious behavior. If you plan to download an executable, it is highly recommended to run it within a to ensure your actual operating system remains secure. Chilled Windows! - TurboWarp