Because repacks are hacked together, they often crash, fail to encode properly, or produce corrupted output files. The time saved on “features” is lost in debugging failed conversions.

Users often look for repacks because the official Format Factory installer is known for "bloatware." During the official installation, you are often prompted to install additional antivirus software, browser toolbars, or games.

However, you can avoid this without resorting to a risky repack.

Use Sandboxie or Windows Sandbox to run the installer first. Check if it tries to access registry keys unrelated to Format Factory (e.g., HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run for startup persistence) without asking.