RE: Realflight and Windows 8
As Bax indicated the problem is not with the simulator. It is with Windows 8 and the installers being affected by chipset drivers.
If you see this problem, you WILL see it with other installation routines.
Note that is is highly UNLIKELY that AMD chipset upgrade will hurt anything. Non-Intel systems will just disregard it, and AMD systems will apply the upgrade only if your system contains a supported chipset... that in spite of the fact that the chipset installer may run to completion successfully no matter what.