Why do 2.0 USB devices not work in 3.0 USB ports?

USB 2.0 device does not work in USB 3.0 port Some USB 2.0 devices do not work in USB 3.0 ports. To fix this, uninstall the USB 3.0 driver in Device Manager. In Windows, search for and open Device Manager. Double-click Universal Serial Bus Controllers to expand the list, and then locate the USB 3.0 root hubs.