If you want to connect a phone with a computer, the PC must have a preloader software. When it doesn’t contain the software, it doesn’t recognize the phone. Therefore, as you can assume, OPPO USB driver software creates a link of third party devices for connecting a PC to a phone. However, every mobile brand like OPPO, Samsung, Sony, Huawei, etc launches their preloader drivers. Also, they make sure that their users can install them effortlessly.