Thank you Lucian! Its frustrating when so many people post opinions instead of solutions.
Your instructions fixed my problem. Key point is to QUICKLY do exactly what you described.
I have 2 computers and two A7726 keyboards. One computer asks for a PIN, the other computer never does. It must be related to the drivers. My work laptop is pretty locked down due to it being my paranoid employer provided. I’m unable to download any updates because I don’ t have admin rights. Anyway, I’m typing this reply on the Anker keyboard paired and working perfect. Type in any pin on the windows device, click connect, then quickly type the same pin on the Anker and hit enter. Paired. Thank you for the posted solution. Cheers.