Don’t know why it didn’t occur to me until I read An ‘attractive’ man-machine interface, but there’ll probably be a time when a person could have a temporary direct computer-brain interface without surgery or an implant or something. Just some nanobugs that you swallow, and that attach themselves to, say, optic nerves, and a wireless device in your pocket talking to them. I think I’d be quite a bit less hesitant to try something like that if it was shown to be reversible over a short period of time.
[If desired, insert joke about how if your brain was running Windows, then…]