RDA (RDA Microelectronics) USB interfaces, managed by the "CoolSand" driver package, typically present as a proprietary USB-to-Serial device (e.g., VID_18D1&PID_0001 or similar). These drivers are critical for:
Windows 10 64-bit introduces stricter security models that block unsigned kernel-mode drivers, directly impacting CoolSand driver installation. coolsand rda usb driver 64-bit windows 10
Test with RDA Flash Tool:
The CoolSand RDA USB Driver is not natively compatible with 64-bit Windows 10. While it can be made to function by disabling driver signature enforcement and using legacy installation methods, this approach compromises system security and stability. For production environments or daily use, it is strongly recommended to use a Windows 7 x86 virtual machine or a dedicated legacy PC instead. RDA (RDA Microelectronics) USB interfaces, managed by the
Once you’ve flashed your ROM or backed up the NV data, revert the security settings: Windows 10 64-bit introduces stricter security models that
bcdedit /set testsigning off
bcdedit /set nointegritychecks off
Reboot. Watermark gone. Secure boot happy.
If you cannot get the CoolSand RDA driver to work, consider these workarounds: