11. Unrecognized Connected Peripheral Items
If your PC doesn’t recognize your keyboard or mouse, your best first step is to reboot the computer and see if that fixes the problem. If the peripheral device is battery operated, make sure the batteries are charged.

12. Scan for Viruses & Spyware
It is very advisable to install antivirus and anti-spyware software on your computer to help you keep your system intruder-free. Apple has earned the reputation for being less vulnerable than PCs, but everyone can use a safety net. Norton and McAffee are the main antivirus software manufacturers.