Go to the start menu, right click on Computer, select Manage, and it should take you to the device manager. With your kindle plugged in, right click on whatever device it says your kindle is, and select uninstall drivers.
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I am just a guy that is trying to learn a little coding and all. Don't go crying to your mommy that something I said was wrong.
Current: Nexus 7 running stock 4.4 (CM11 soon)
Retired: Kindle Fire running Jellybean CM10.1 / Android 4.2.2