You failed to provide a problem thats a problem in itself First, please disconnect all USB devices and then perform the following steps: Click "Start" button, type "devmgmt.msc" (without quotation marks) in the "Search" bar and press "Enter". Click "Continue" if necessary. In Device Manager, double click to expand "Universal Serial Bus controllers", right click on the Host Controller, click "Uninstall" and click "OK". Repeat the step 2 to uninstall all items under "Universal Serial Bus controllers". Then, restart your computer and Windows 7 will reinstall all USB controllers automatically. click start control panel administrative tools computer management device manager scroll down universal serial bus controllers you could see a yellow question / exclamation mark? ! or a red X you will need to update/reinstall drivers right click to reinstall drivers ports(com&lpt)right click update driver sometimes the wires inside the cable will be damaged due to bending or stretching or placing heavy equipment upon the cable just replace the cable of the hard disk, when you plugged the external disk drive you got that windows could recognize the USB device change the cable everything should work fine again, if you can see your usb drive but its not working ports (com&lpt) right click update driver if this fails to fix the problem check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems to a computer and its parts if this fails to fix the problem Some addition links found on Google http://www.easeus.com/resource/hard-disk-data-recovery.htm
w7
for xp
if you can see your usb but its not working
Downloads to Recover Your Files and Save Your Bacon and 10 Best Free Hard Drive Utilities.
http://www.datarecoveryreview.net/
hope this helps
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