If you are installing from the blue disc, you shouldn't have any problems.
But remember to right-click the install program and "Run As Administrator".
If you are installing from an older Black and White disc, there are a few extra steps to follow.
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Re: New project - MSFS C++ USB interface
The design is based on a classic switch (On/Off) but if I understand correctly, in special cases, the push button should be in a specific state and user is not allowed to change that.
Ioannis Yesterday, 21:38Ioannis