On my Windows Fall Creators Update suddenly MTP stopped working.
I couldn’t access my Amazon Kindle and also all of our Galaxy Phones… The Galaxy S4 and the Galaxy S6.
It appears that the latest update did delete the MTP drivers and broke the connection.
To fix it i went to the folder called C:\Windows\INF\
and right clicked on the file called wpdmtp.inf and then in the menu clicked Install.
Then i waited a bit, rebooted (don’t wait too short before rebooting) and the Kindle reappeared.