If you have an older system (Windows XP through Windows 7) where it still runs reliably, the software provides:

John searched online for the license key, but all he could find were free trials and demos. He didn't want to be limited by a trial version, so he decided to look for a legitimate way to purchase the license key.

has largely discontinued support for this software. The last major version, 4.0.444, was released in April 2017. Safety Warning:

As operating systems evolved into Windows 10 and 11, the architecture supporting legacy software like ArcSoft began to crumble. ArcSoft eventually moved away from the webcam utility market, focusing on other imaging solutions, leaving WebCam Companion as a "trial version" artifact on many download sites. This discontinuation creates a vacuum; users with older hardware often seek "license keys" to reactivate software that originally came pre-installed on their machines but was lost during a system wipe or OS upgrade. The Ethics of "Top License Keys"

– Check the official ArcSoft website or authorized resellers (though note that ArcSoft no longer actively supports older products like WebCam Companion 4).

The phrase "license key top" often appears on sites offering unauthorized serial numbers or cracks. However, because the software is no longer officially supported or sold by ArcSoft, finding a legitimate, new license key is generally not possible through official channels. Important Safety & Legal Considerations Malware Risk