1. Right-click the computer in win 10 64-bit system->; Properties, click Device Manager;

2. Click-> Ports (CoM and LpT). CoM information appears, and right-click to select Properties;

3. The attribute information of CoM port appears. Click-> Advanced;

4. Pop up the advanced setting interface of CoM port;

5. Click the drop-down menu on the right side of "CoM port number" to select and modify.

2. Click-> Ports (CoM and LpT). CoM information appears, and right-click to select Properties;

3. The attribute information of the CoM port appears. Click-> Advanced;

4. Pop up the advanced setting interface of CoM port;

5. Click the drop-down menu on the right side of "CoM port number" to select and modify.