If your Windows 8.1 machine is a tablet, good for you. You probably won’t have to spend much time mucking around with peripherals and their drivers. But if you have a regular PC, adding new gear is part of the fun. Hard drives, flash drives, cameras, phones, printers, scanners, network cards, video cards, keyboards, monitors, game controllers, and other accessories all make life worth living. When you introduce a new piece of equipment to the PC, you must hook it up and install its driver, the software that lets a new gadget talk to the rest of the PC.