Use Device Manager to scan for hardware changes. After your computer scans for hardware changes, it might recognize the USB device that is connected to the USB port so that you can use the device.[br]
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To scan for hardware changes, follow these steps:
# Click '''Start''', and then click '''Run'''.[br]
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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.
# In Device Manager, click your computer so that it is highlighted.
# Click '''Action''', and then click '''Scan for hardware changes'''.
# Check the USB device to see whether it is working.
2- To disable and re-enable the USB controllers, follow these steps:
# Click '''Start''', and then click '''Run'''.[br]
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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'''.[br]
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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.