Unflyable

Purchased 757 and RR expansion pack
Running latest P#Dv4.6 and have the latest version of BASE PACK and RR add-on.

Aircraft stabilizer moves by itself regardless of autopilot on/off. If I manually move the stabilizer trim to full up or full down, it moves on its own to neutral. I cannot manage to take off. If I use the “slew” option and “place” the aircraft at any altitudes, same thing happens. Unable to climb or descend, turn left or right, or use the autopilot. If I use an external view, I can see all control surfaces move with my inputs but aircraft does not respond. ONLY thing that works is the autothrottle.

I have started the 757 in ALL states, from cold and dark, to ready for take off with NO result. I can taxi, turn stop, etc…. but have no control of stabilizer trim, take off, or turn left or right in air (after “slewing” in the air)

I have deleted and reinstalled several times with no result. I’ve followed the Windows 10 warnings and instructions on Defender, etc. Nothing! Have had this aircraft since it was released for P3Dv4 and have not been able to make it work.

I was patiently waiting for an update since I know new products have bugs, but now it remains unflyable after ALL the updates -on.
Please help