After installing Windows 7 today, I went to the Microsoft website to apply for one of the 2.5 million activation codes released by Microsoft, and the activation was successful. I immediately prepared to demonstrate in real-time to my friends using the webcam. This webcam is a driver-free model. However, during the installation process, I encountered some twists and turns before successfully setting it up. In the past, I've written logs about webcams, covering topics such as the ultimate solution for when webcam drivers won't install, downloading the latest universal webcam drivers, solutions for issues where plug-and-play webcams aren’t recognized, reasons why webcam drivers may fail to install, and problems like laptops failing to shut down properly due to built-in webcam drivers. Today, I will organize and share some basic knowledge on how to use driver-free webcams.