So far the issue seems to be fixed, fingers crossed it stays this way!thank you all very much.

Glad to have helped.

Hi haztronic,One another anomaly in your fsx.cfg is :[DISPLAY.Device.NVIDIA GeForce GTX 580.0]Mode=1440x900x32Anisotropic=1You said that you are using a HDTV as monitor . I suppose that your GTX 580 is linked to your HDTV with HDMI cable, so your mode must be 1920x1080x32. And if you are using NVidia Inspector, it would be better to use Trilinear = 1Pierre LFBE