The com port of the computer is occupied.

Com5 ~ Com 15 are all occupied due to repeated trial installation of different versions of Bluetooth drivers. After the driver is successfully installed, only COM 16 can be used, and synchronization software is not recognized. Who can explain? thank you

In the device that uses USB to serial port, because there is a problem with the previous device, it is found that all the COM ports used before are now in use, and the number of newly allocated COM ports in the device is counted down from before. For example, COM7 was tried before, and COM8 came out directly after the new device was changed, and COM2-COM7 are all in use (COM 1 is reserved by the machine).

How to delete the COM port used in the computer?

My computer often uses Bluetooth, cell phone data cable and so on. Every time a new device is installed, windows will automatically assign a new virtual com port. Now I plug in a new device and use COM25. Looking at the device manager-port -com25 properties-port settings-advanced -com port number, I found that all devices from 3 to 24 are "in use". How can I delete the previous one?

solution

Open registry win+R

Enter the registry

Find HKEY _ local _ machine/system/current control set/control/communication name arbiter.

Delete ComDB and try again! (Note: This will rebuild all COM ports). If not, restart the computer!

Insert CH340 device

Open Device Manager-Ports (double-click to enter)-Port Settings-Advanced-Modify the COM port number (change it to the port number you want to set).