Why can't I send a fax?

This is because the default printer settings are wrong, just modify them as follows:

1. First, open the control panel, and then click the device and printer options.

Step 2: In the pop-up window, you can see the fax printer, which is a pop-up fax.

The third step, if you don't use fax, you can delete it. Right-click and select Delete Device.

4. Finally, on the common printer, right-click and select Set as default printer.