I have three Windows 10 laptops (2 Dells and a Toshiba) all connecting to our repeater (not a Jefa) without any problems. In fact, my experience so far is that Windows 10 is more stable with respect to wifi than Windows 8.1 had been.
My question to the OP is does his computer connect to other wifi sources without any problems? As far as the computer is concerned there's nothing special about the connection just because it is a repeater. WiFi is WiFi.
IMO the chances are that the wifi driver in his computer is getting "hung up" during the connection process with the repeater. I had a similar problem getting my repeater to connect to a particular campground wifi even though it connected to everything else just fine and all the other devices connected to that same wifi without issue. In that case we did eventually solve the problem but it took changes to the repeater's internal firmware to make it work. In this case, since it's unlikely that the OP can change the computer's wifi driver, the only hope would be for Jefatech to be willing to spend the time to resolve the problem.
