Problem with peripherals can happen suddenly. Yesterday your printer, mouse or keyboard was working fine, you turn your computer on today and boom – no printer, mouse or keyboard at all. In most cases this problem can be caused by driver issues. First, try to connect your faulty hardware to another USB port. Sometimes this helps to repair minor faults.
In some cases the problem can be with faulty hardware. If none of your peripherals connected through USB are working, this is most likely a motherboard fault. If you have a Wi-Fi printer and it is not working, this can be caused by the wrong (or faulty) drivers or a bad Wi-Fi router configuration.