Open the Hardware and Devices troubleshooter by clicking the Start button , and then clicking Control Panel. In the search box, type troubleshooter, and then click Troubleshooting. Under Hardware and Sound, click Configure a device. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
If the troubleshooter does not fix the issue, let’s use Device Manager to disable and re-enable all the USB controllers. This lets the controllers recover the USB port from its unresponsive condition. The USB controllers represent the USB ports in Device Manager.
To disable and re-enable the USB controllers, follow these steps:
1. Click Start, type device manager in the Start search box and hit Enter.
2. Expand Universal Serial Bus controllers.
Note You might have to scroll down the list to find this item.
3. Right-click the first USB controller under Universal Serial Bus controllers, and then click Uninstall to remove it.
4. Repeat the above step for each USB controller that is listed under Universal Serial Bus controllers.
5. Restart the computer. After the computer starts, Windows will automatically scan for hardware changes and reinstall all the USB controllers that you uninstalled.
6. Check the USB device to see whether it is working.
Additionally, make sure you update the chipset drivers on your computer. Download and install the latest Windows 7 compatible drivers and check if that fixes the issue.
For more information on updating drivers, seeUpdate drivers: recommended links