If your network printer has stopped working, here are some things you can try.
Verify your computer is set to a "Private" network profile. Your computer and printer cannot see each other in a "Public" network profile. This sometimes gets changed during a Microsoft Windows update.
Verify your printer is still connected to the network. If using WiFi, make sure the WiFi signal indicator is solid blue. If plugged in using an ethernet cable try unplugging and/or changing ports on the router. If the printer has lost the connection, shut down and restart the printer. Even better is to turn off the printer and computer then turn the printer back on first and then the computer.
Clear the printer queue on your computer. In some cases, it is a corrupted print job that is holding up any future attempts to print. So, open the queue and delete any and all existing jobs.
When all else fails, uninstall the printer software and remove the printer from device manager. Once done, restart the computer then reinstall the printer using software downloaded from the printer manufacturer's website. DO NOT get drivers from a "Driver Update" website or service.
Alan Starkey is a CompTIA certified computer technician with 30 years experience in computer repair.