Hi Pieter,
Graphics issues with Flight Simulator X are possibly caused by an outdated graphics card driver. To resolve your concern, we suggest that you install all the critical and important Windows Updates on your computer by following the steps on this link.
It is also recommended that you update the graphics card by following the steps below:
- Select the Start button, typeDevice Manager, and select it from the list of results.
- Expand one of the categories to find the name of your display adapter, then right-click (or tap and hold) it, and select Update Driver. For graphics cards, expand the Display adapters category, right-click your graphics card and select Update Driver.
- Select Search automatically for updated driver software.
- If Windows doesn't find a new driver, you can try looking for one on the device manufacturer's website and follow their instructions.
If these steps don't work, try reinstalling the driver:
- Open the Device Manager.
- Right-click (or tap and hold) the name of the display adapter.
- Select Uninstall.
- Restart your PC and Windows will attempt to reinstall the driver.
For more information on how to troubleshoot graphics issues in Flight Simulator X, you may visit this link.
Should you need further assistance, you can reply to this post anytime.