Solution. #5. In device manager go to universal serial bus controllers and expand this. Then now click on "view" on the computer management window tab on the top and click on "show hidden devices", this will bring up all usb drivers for any usb device that was previously connected to the laptop, so this will evident by a greyed-out look to them.
The USB ports are not functioning for any device and is true in my MB UEFI screen not just Windows. The only USB ports that are working are the USB 2.0 ports on my case. My MB only has USB 3.0 on the back panel. I have a ASRock z97 Extreme6 and my BIOS version is 2.70. In Device manager I have an unknown USB device (configuration descriptor One cause of faulty USB 3.0 ports is faulty or missing drivers. Fortunately, updating your Windows system with the latest drivers can help reinstall them. Click on the Start button and then So if the USB 3.0 ports stop working after Windows reinstall or upgrade, try updating the drivers and the problem should resolve. There are 3 ways recommended below that you can use to update the drivers for your USB 3.0 ports. Way 1: Use Windows Update Note: To use this, please make sure Windows Update feature is enabled. Follow these steps: 1. In some situations, when a laptop switches from battery to power cord, how the power supply delivers power to the USB ports may stop working. To verify this is not the problem, follow the steps below. Unplug the USB devices and power cable from the laptop. Leaving all the cables disconnected, restart the computer. Viewed 13k times. 1. I have a legacy device that works fine on USB 1.0 or USB 2.0 ports. However it does not work properly on a USB 3.0 port. I've tried it on a PC with both USB 2.0 port and USB 3.0 port (it works fine on the 2.0 port on that machine but not on the 3.0 port). The device installs fine on both, e.g. windows will detect it. My new PC comes with USB 3.0. The USB 3.0 cable is connected to the motherboard and I have installed the USB 3.0 drivers from the disc that came with the motherboard. When I plug in a USB device (e.g. flash drive), the light lights up but the computer doesn't pick up the device. The device isn't sazMX1Z.
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    • laptop usb 3.0 port not working