Reboot. You’ll see "Test Mode" watermark bottom-right of desktop – that’s your green light.
: While modern versions are available for Windows 10, many of these drivers are based on older "Linux Gadget USB-to-serial" or "RDA COM Enumerator" architectures Installation Highlights for Windows 10 64-Bit coolsand rda usb driver 64-bit windows 10
Some RDA chips (RDA8851, RDA8852) were so power-efficient that they ran Doom via serial before many ARM Cortex chips. You’re not just fixing a driver – you’re enabling a piece of mobile history. Reboot
Choose "Browse my computer for drivers" and navigate to your extracted folder to select the .inf file manually. Common Troubleshooting coolsand rda usb driver 64-bit windows 10