Computer #5 is what I use at home. The regular mouse that's attached get's "stuck" - it won't move in one axis or another. I've taken the thing apart, cleaned it, etc., but the problem persists. I just happened to see a wireless mouse at a store, no name brand, and it was only a couple of bucks, so I purchased that. It sucks. Big time. The scroll down wheel will scroll down a couple of lines, then suddenly jump up twice as many lines, or vice versa. Plus, the computer is at the bottom left of where I sit, and if I use the mouse to the right of me, it appears to be too far to get a good signal back to the little dohickey that's plugged into the USB. So, to even be usable at all, I have to use my left hand with the mouse. And, the battery seems to die in about 1 day. The battery is currently dead, and I simply haven't thought of it when I was out shopping - to get a new corded mouse (I'm not bothering with the battery again; I'm throwing the piece of garbage out.)
So, #5 is what I live with at home. It's pretty easy once you get the hang of it.