Find the printer at the beginning and right-click the property to find the port. Then select the port you need to change below. You can try to change it several times until you can print it.

Detailed steps:

1. Click "Start" at the bottom left, find "Devices and Printers" and click "Open".

2. In the pop-up window, find the name of the printer whose port you want to change, right-click the printer icon, select Printer Properties, and then click Open.

3. In the new pop-up dialog box, find the "port" as shown in the figure and click it.

4. Then select the port you need to change below. Now, most ordinary printers have USB interfaces. Generally, you only need to change different USB interface options. People who don't know can try to change it many times until they can print it.