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04-01-2012 11:25 PM - edited 04-01-2012 11:27 PM
After installing HP software, if you happened to see the Scanner is not found error message. There is a chance you device may have been disabled.
Here is the way to enable it.
Go to Windows START ->Computer->System Properties->DEVICE MANAGER ->Imaging Devices
Right Click HP Printer and Enable it.
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(Although I am employed by HP, I am speaking for myself and not for HP)