USB Root Hubs not showing in device manager


Oct 1, 2013
Hey guys

I have a Dell Inspiron 3521 (Windows 8.1), whose USB ports suddenly stopped working. The USB Root Hub showed a yellow exclamation mark next to it in device manager, so I tried uninstalling them and restarting the laptop to no avail. It now shows 3 Unknown devices and no USB Root Hubs.

I have tried installing the latest chipset drivers with no luck. Does anyone have any suggestions?

Please do try to uninstall/reinstall that driver that has a problem. :)
- In Device Manager uninstall those 3 unknown drivers.
- Download install the Intel Chipset driver from Dell Support site.
- Here's the link:
- Once the driver has installed reboot your laptop then check Device Manager again if it would be listed normally and will work.
- If these will not work do a System Restore, restore it back to an earlier date or time when you remember it was working fine.
- Lastly, doing a clean install would also resolve the issue.
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