Modern Windows blocks unsigned kernel drivers.
If Windows has installed a corrupted driver cache that re-installs itself every time you plug in: rkdevtool no devices found
For more specific guidance, could you provide more details about your device and the environment where you're using rkdevtool? Modern Windows blocks unsigned kernel drivers
Most devices have a physical "Recovery" or "Boot" button. Hold the button down while the device is powered off. Hold the button down while the device is powered off
It had blinked exactly once during boot. Then nothing.
Finally, software conflicts within the Windows environment can interfere with device detection. Antivirus programs or firewalls occasionally flag the low-level USB communication of RKDevTool as suspicious behavior, silently blocking the connection. Running the application with Administrator privileges and temporarily disabling restrictive security software can clear these digital obstacles. By methodically addressing driver installation, physical link integrity, and software permissions, users can reliably clear the "No Devices Found" error and proceed with their development tasks.