When your printer provides you with a message that it is not able to communicate with your computer, this could be an indication of a loose cable or a missing communication link. You will want to restart the computer for the printer repair and check all cables in the process.
If you purchased a new printer and can not get it to work correctly, it could be the printer did not install onto your computer correctly. This computer repair is simple as reinstalling the software and making sure that the unit is compatible to your own unit.