I have an MSI GT70 laptop with windows 8.1, all the updates I can find have been installed. When I connect my USB 3.0 drive into a USB 3.0 slot, It disconnects and reconnects constantly, even when external power is hooked up as well. However, installing that same drive into the USB 2.0 port on the same laptop makes it work flawlessly. It works perfectly on my other computer with windows 7 on USB 3.0 as well... I have tried the registry hack and every other fix I have heard of with no joy.