HAL3 (Hardware Abstraction Layer 3):
XML Config Files:
The Linux kernel maintains excellent reverse-engineered drivers for these ancient chips via the gspca framework. For example:
On Ubuntu or Raspberry Pi OS, simply plug in the GPlus camera. Install guvcview: sudo apt install guvcview. Launch it. The camera will likely work at full resolution (640x480 or 1280x720 if lucky) without any driver hunting.
Microsoft changed the driver model significantly after Windows 7. The old GPlus drivers used kernel-mode hardware access that Windows 8 and later block for security reasons (specifically, the removal of the old VideoCapture.sys direct access). When you try to install a 32-bit XP driver on Windows 10 64-bit, you get the dreaded: "This driver is not digitally signed" or "The hash for the file is not present in the specified catalog."
This is the most common error.