"Device not found" or "Drivers missing": This is usually a Windows driver signature enforcement issue. You may need to restart Windows in "Disable Driver Signature Enforcement" mode to successfully install the Flashtool drivers.

To use Flashtool-v5.0.1:

Get from a trusted source (official manufacturer site or reputable forum). Avoid random file hosts. Extract the ZIP to a folder like C:\FlashTool_v5.0.1 .