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Unable to install local USB printer

Posted on 2009-07-01
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Last Modified: 2013-12-15
After running cleanspl.exe from the Windows 2003 Resource Kit, when I try to install any local USB printer, I get an error that says "The specified port is unknown".  I followed the advice given in ID: 23873026 and still was not able to create a USB port for the printer.
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Question by:gmbrammer
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Assisted Solution

by:saul2paul
saul2paul earned 100 total points
ID: 24753523
which manufacturer 's printer are you using ?
Try installing the drivers first and than plug in the hardware...
Check if your usb ports are given any access rights...
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Accepted Solution

by:
gmbrammer earned 0 total points
ID: 24753758
I reinstalled the chipset drivers for the MB and it solved my USB port problem.  Thanks for your suggestion that was a good first step, but I had already tried it.
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Expert Comment

by:saul2paul
ID: 24753801
The first thing that had to be done was to uninstall all leftovers from the installation of the HP printer. This can be done with the HP Scrubber software which should be available on the installation CD. The uninstallation software can also be downloaded directly from the HP website. (It is located in the /ccc/ folder on the disk and can be started by clicking on uninstall.bat)

All leftovers were removed after a reboot which ensured that the next installation would be a clean one. The problem hat to be connected to the USB Monitor. A quick look in the Windows Registry verified that assumption.

Start the Windows Registry Editor with [Windows R], [regedit] and [enter]. Now navigate to the following Registry key:

HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Print/Monitors

Check if a subkey with the name USB Monitor exists. If not create it by right-clicking Monitors and selecting New > Key. Name that key USB Monitor.

Now right-click in the right pane and select New > String Value from the menu. Enter Driver as the name. Double-click driver and enter usbmon.dll as the value.

Now restart your computer and perform the printer installation again. The installation should go through without problems now and the error message the specified port is unknown should not appear.
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Author Comment

by:gmbrammer
ID: 24773314
Thanks for the additional info, but I had already tried that too, and it was not effective at all.  The reload of the MB chipset drivers was what finally succeeded.
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