Since upgrading to win 10 pro 64-bit, I now get OOM from FSX. My worst one is iFly 737. In win 7 I had no problems. I even started at a default airport with my ifly 737 and once in the air, headed out over the ocean. Using VAS monitor, the memory usage kept climbing till it was over 4 gigs. Then It said I was out of memory. The scenery should have brought the memory down the further I went over the ocean. My PMDG 777, level-D, MJC Q400 all work fine. I do have 16 gigs of ram, but something is really hogging the memory with my ifly 737. Is there a way to find out what it is? Also, fsx doesn't shut down completely when I exit, until I end it with the task manager.