Click Start, and then click Run.
- Note If you are running Windows Vista, click Start, and then use the Start Search box.
- Type devmgmt.msc, and then click OK. Device Manager opens.
- Expand Universal Serial Bus controllers.
- Note You might have to scroll down the list to find this item.
- Right-click the first USB controller under Universal Serial Bus controllers, and then click Uninstall to remove it.
- Repeat step 4 for each USB controller that is listed under Universal Serial Bus controllers.
- Restart the computer. After the computer starts, Windows will automatically scan for hardware changes and reinstall all the USB controllers that you uninstalled.
- Check the USB device to see whether it is working.
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