MarkOz not sure if this helps but since I installed REX Essential PLUS I have some strange issues with my joystick (Logitech) and FSX. What I find is when FSX starts that the joystick controls are no longer calibrated or appear to be mis-assigned, I have to redo the profile on the joystick and check the FSUIPC as well before I can do any flying as everything is all over the shop and a key or button assigned to say flaps does nothing and the button assigned to rudder will operate flaps etc. This is becoming very tedious as no brakes and no undercarriage control via the joystick other. I takes me several goes at reprofiling and recalibrating to make it work as it should. Ah yes and I also get windows hangs and conflicts until this is all resolved

I have a sneaking suspicion that it is to do with the internet com connection protocols being used by REX now as it appears to harness or use an Apple Mobile device communication program to connect to the servers and download weather etc. The reason I suspect REX and its com program is that I never had these issues until I installed REX Essential.

Worth considering as it seems unlikely that Windows 8 would radically remap a lot of keyboard or mouse calls and or the general windows behaviour (C++ and VB programming is relatively stable and unlikely to be redone by MS in anyway and the NET programs similarly stable and not that different, I suspect it is an Apple v Window issue make itself known via REX or similar.