| Error Message | Solution | |---------------|----------| | “The hash for the file is not present” | You forgot to disable driver signature enforcement. Reboot and redo Step 1. | | “Device descriptor request failed” | Use USB 2.0 port, disable USB selective suspend in Power Options. | | Driver installs but phone not detected | Install VCP drivers (Virtual COM Port) from FTDI or Prolific – some RDA phones emulate standard COM chips. | | Windows 10 automatically replaces driver | Disable automatic driver updates: Go to System Properties → Hardware → Device Installation Settings → “No”. | | Blue screen (BSOD) after connecting | Incompatible .sys file. Boot into Safe Mode, uninstall driver, try a different version (e.g., v1.3). |
: To prevent conflicts, uninstall any previously installed RDA or mobile USB drivers before starting the new installation . Installation Steps for Windows 10 (64-bit) coolsand rda usb driver 64-bit windows 10
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