There are many reasons due to which the printer can stop working but sometimes you wonder, why is my printer not responding to my computer. The reason is that the connection between the printer and the computer is lost. Your printer should be connected to the computer through the WPS method or by an Ethernet cable. Another reason for printer not responding to computer is that the printer is not set as the default printing device on your computer. Click on the start menu and click on the control panel. Select the printer option and set your printer as the default printing device.