Windows 10 Professional 64 bitm Insider Preview Verion 1709 (OS Build 1709.1002) THE latest!!
aaaahhhhhh!!!!! I checked that Nvidia setting and mine base proflie was sset to the Nvidia GPU. So I changed that setting to Auto. THAT time I installed paint.net I was offered Express or Custom Installation - I wan't offered on the 3 previous attempts to install it. So, after changing that Nvidia settings paint.net did in fact install correctly!!
Thanks a lot.