I have tied on two different computers one was an AMD processor and the other is a Intel processor. On both computers I went to the device manager and tried to update the comport but it failed on both computers. I have followed the instructions to the letter from your help files

MEGA2560 R3 will not load drivers

anon13120794 May 21, 2018, 11:01pm 19

That is all I can think off at the moment...

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