I have a problem regarding Xplane 11 on Win10 64-bit. I have a GTX1060 and an i5 CPU.
So, when I alt-tab out of Xplane 11 I get massive frame drops when I go back into XP11. I have no clue how to fix this, but I have made sure that my OS and graphics drivers are up to date. I also read somewhere online that disabling Game DVR in the Xbox app on Win10 may fix the issue, however, it doesn't.