If you have version 5, 6, or 7 installed, remove it via Windows Control Panel. Reboot your PC. Newer versions leave registry keys that conflict with the old driver.
Open any video app (Zoom, Skype, OBS). Select "ManyCam Virtual Webcam" as your source. If you see a green "ManyCam 4" logo, you are operational. Troubleshooting Common Issues with the Old Version Even with a clean install, ManyCam 4.0.52 may act up on modern systems. Here are fixes for the three most common complaints: Manycam 4.0 52 Old Version
If you decide to hunt for this digital fossil, proceed with caution. Verify your downloads, isolate the installation, and accept that no support forums will help you with bugs. But for those who successfully revive ManyCam 4.0.52 on an old i5 desktop, the result is a stable, no-nonsense virtual camera that "just works." If you have version 5, 6, or 7
To prevent the software from auto-updating (which would break it), open Windows Defender Firewall > Advanced Settings > Outbound Rules. Create a new rule to block ManyCam.exe and ManyCam_Update.exe . Open any video app (Zoom, Skype, OBS)