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* The system of window 7 or more can install the driver automatically,just wait for a moment; ![](https://box.kancloud.cn/ec91bba2da0273cbafe593229a72f938_523x209.png) * If automatic installation failed,you can install manually,find the hardware without installing driver in the device manager; ![](https://box.kancloud.cn/9b637929c34c12f0ffb6511cb637bb23_334x86.png) * Click the right mouse button and click “upgrade driver software”; ![](https://box.kancloud.cn/e9fa5363d04d8f57599a0b1cf46b4dd0_256x154.png) * Choose“Through the computer to find the driver software(R)”; ![](https://box.kancloud.cn/bbe93bb3df855a85f970d4e9ffbd03d8_554x426.png) * Click “Browse”; ![](https://box.kancloud.cn/40a586a05b98424416a38a1643469880_554x429.png) * Choose D:\RT809F\DRIVER; ![](https://box.kancloud.cn/dcc62fc4709657ce851e67e429f9e232_547x431.png) * Click “OK”and “Next”; ![](https://box.kancloud.cn/81b9e6f3016dc6c33bfce2c0f1000164_554x269.png) * Next install the other 2 drivers in the same way,; ![](https://box.kancloud.cn/edc9b5944bfd84d0741a2a685e7baa9a_554x326.png) * USB serial port driver,the corresponding ground serial port of programmer is COM4; ![](https://box.kancloud.cn/754f1504a9ab92b2ebcd3f926e75757b_541x244.png) * After installing,open the RT809F software and can see the serial number of the programmer. ![](https://box.kancloud.cn/b363df41e13d71e0de43e8350a034035_554x477.png) * **The serial number is the only proof for technical support and warranty.Please do not leak, properly and secretly kept.**