I am REALLY sorry to be asking you this, but I have to, so we can isolate what is happening. Can you install a completely clean copy of X-Plane, no scenery, no plug ins, nothing. JUST the sim, on another hard drive (if you have the space), and then install the TBM ONLY into that, and see if the problem persists. I sincerely apologize for making you jump through hoops, because this is not what you paid for when purchasing the TBM, but it will really help us find out the cause of a problem only a few of you have.