FSX seems not to be woring with Windows 10 since SOMEONE does not want to tell the truth about it.
My system is an Intel i7, 3.2 GHz, 16 GB RAM, ASUS 1060 dual OC 6 GB graphics card and the absolute lowest graphic settings but still I get Out of memory on all approaches.
Now I have tried all settings possible and spent about 30 hours in the FSX with PMDG Boeing 747 ver 3 and PMDB Boeing 738. Same problems regardless of aircraft BUT only in Windows 10.
Windows 7 Ultimate which I had before the disgusting update worked fine with the most advanced graphics settings.
So you can wonder what Microsoft is doing, more important to spy on users rather that a working professional Windows version.
Win10 is JUNK!!!!