I have a double boot of Windows 7 and Ubuntu 14.04 (Trusty Tahr) on my Dell Inspiron-15-7537
If I boot into Windows after I have been running Ubuntu, my USB ports do not work, neither the USB 2 or 3 ports. However, if I then reboot Windows once more they start working again, and will keep working until I go back into Linux again.
When in Linux they also work fine.
What could possibly be causing the USB ports to not work in Windows after running Linux?