The good news for me is that FSX is running good in Win 10, and many of my addons are working too, like FDC Live! Cockpit and GSX. Others like Carenado Beech B1900D and Flight 1 ATR72-500, not so good.....they apparently just aren't compatible with Win 10. Just bought this new gaming computer and it had Win 10 installed on it, but overall getting 45+ FPS on complex aircraft and scenery and 100+ flying the Cessna Skythawk; pretty cool.....