This is an FYI for those interested. Yep, I resorted back to Windows 8. Two problems I had, one of which could not be resolved. With the June firmware upgrade, OpenGL failed with an astronomical software package I had. Research indicated others, many, had the same issue, with games and such. The solution was to install the graphics driver from Intel and make sure MS didn't reapply the June firmware upgrade. Windows 8.1 I had network problems that I noticed from day 1 on 8.1. Issues were on wireless lan's, not a connected network. If I streamed entertainment content on Wi-Fi (like Pandora or amazon prime video) it was barely useable. If I connected Bluetooth audio to it, it was not at all usable. Searches also brought out other similar problems with Wi-Fi people were having. Could the lack of a firmware upgrade have solved the problem, I don't know for sure. Now I have been back on 8.0 for about a week now and my Wi-Fi / blue tooth issues have all gone away.