Look at the attachment you made to post #7 above.
Doesn't it say: USB ID: 1949 DEAD
This version has been mentioned as containing the corrected USB networking driver:
https://docs.microsoft.com/en-us/win...0-version-1709
When the Kindle is working properly, you don't have to diddle drivers in Windows.
But I do not know of a Windows version that handles vendor:device == 1949:DEAD (which is a hexadecimal number).
There are a number of places you can look that information up, such as:
http://www.the-sz.com/products/usbid...1949&p=DEAD&n=
Where you can see what device that device code refers to.