How to Fix USB Communication Problems
USB ports on your computer allow you to run a variety of devices including digital cameras, portable MP3 players and video cameras. Once you connect USB devices to your computer, you are able to perform a variety of functions such as mail sync, file transfers and more. Occasionally, USB ports may stop responding or fail, which as a result causes sync problems. With simple troubleshooting skills, you can repair your USB ports and communication.
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Instructions
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Scan for hardware changes. To do so, click the Windows "Start" button and click "Run" (Windows XP users) or "Start Search" (Windows Vista and 7 users). Type "devmgmt.msc" (without quotes) and press "Enter" to launch the Device Manager.
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2
Click your computer on the Device Manager and click "Action." Click "Scan for hardware changes." When the process completes, reconnect your USB device to the computer and wait for a detection. Move to the next step if your computer still does not detect the USB device.
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Disconnect your USB device from the computer. Shut down all currently running programs and restart your computer. Reconnect your USB device to the computer after your computer restarts. Continue normal use if your computer detects it. Move to the next step if you are still experiencing connection problems.
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Disable and re-enable USB controllers. To do so, disconnect your USB device from the computer. Click the Windows "Start" button and click "Run" (Windows XP users) or "Start Search" (Windows Vista users). Type "devmgmt.msc" (without quotes) and press "Enter" to launch the Device Manager.
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5
Scroll down the Device Manager and expand "Universal Serial Bus Controller" by clicking the "+" sign next to it. Right-click the first USB controller under "Universal Serial Bus Controller" and click "Uninstall" to remove it. Perform the same procedure to the remaining USB controllers under "Universal Serial Bus Controller." Close the Device Manager.
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Restart your computer. When your computer restarts, it automatically scans for hardware changes and reinstalls the USB controllers you uninstalled. Connect your USB device back to the computer. Contact your computer manufacturer if your device still does not work.
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