Monitors are easy to replace - easier than keyboard and mice in fact, since you can remove one and plug a new one in with the PC running, and should be fine assuming you do it in a resolution both monitors are capable of.

It's basically plug in the video cable between the monitor and computer, plug in the power from monitor to a free wall socket, and it's ready to go

You can install drivers if you want, but usually it's not worth it unless it's a huge screen that can do 2048 x 1536 120 Hz or something fancy, since the drivers really only tell Windows what resolutions the monitor is capable of - most monitors are fine with the default "Plug and Play" monitor driver installed.