In win 10 system, if the serial device is plugged into the computer for the first time, the system will move around and assign a port number. After many USB serial ports are plugged into computers, the serial numbers obtained are randomly assigned. If it needs to be set to the specified serial number, how to modify it? It can be operated by the device manager. Now I'd like to share with you the specific steps for the device manager to modify the serial number under win 10 system.

1. Right-click this computer icon on the desktop and select the Properties menu item;

2. Click "Device Manager" in the "System" dialog box;

3. Click on the ports (COM and LPT) in the device management interface;

4. Select the serial port to modify in the pop-up serial port list, and right-click "Properties";

5. The properties dialog box as shown in the figure below pops up, and click "Port Settings";

6. Then click "Advanced ..." button;

7. Enter the advanced setting interface, click COM port number setting, and select the serial number to be set;

8. Then click OK to save the settings;

9. A prompt box appears as shown in the figure below, and click the "Yes" button.

10. Finally, click "OK" to make the setting take effect immediately.

The above is the detailed operation steps of how to modify the serial number of the device manager under win 10 system. It can be modified according to the above method.