I cannot install a HP Deskjet D2300-series printer. The installation process
tells me "The specified port is unknown." I try to install manually (select
a port), and the only port options are TCP/IP port and Local Port. Where is
the USB port???

The Device Manager shows that USB Printing Support is installed (looking at
the device manager via Devices by Connection shows the USB printing support
connected thru the USB root hub, which looks right to me).

On another computer that has a USB printer, when I look at the ports for
that printer, it says it's connected to a 'virtual' printer port (USB001).
On the computer with the problem, no such printer port exists.

Uninstalling and reinstalling the printer doesn't help. Unplugging and
plugging the USB cable back into the computer doesn't help. Each time, at
the end of the installation process, I get "The specified port is unknown"
and the install fails.

I should finally note that I was suggested (on another forum) to use the
cleanspl XP power tool to help fix a different printer problem I was having
on this computer. It seems it just made it worse.

Help!

On May 15, 8:21 am, andy9999 <andy9...@discussions.microsoft.com>
wrote:
> I cannot install a HP Deskjet D2300-series printer. The installation process
> tells me "The specified port is unknown." I try to install manually (select
> a port), and the only port options are TCP/IP port and Local Port. Where is
> the USB port???
>
> The Device Manager shows that USB Printing Support is installed (looking at
> the device manager via Devices by Connection shows the USB printing support
> connected thru the USB root hub, which looks right to me).
>
> On another computer that has a USB printer, when I look at the ports for
> that printer, it says it's connected to a 'virtual' printer port (USB001).
> On the computer with the problem, no such printer port exists.
>
> Uninstalling and reinstalling the printer doesn't help. Unplugging and
> plugging the USB cable back into the computer doesn't help. Each time, at
> the end of the installation process, I get "The specified port is unknown"
> and the install fails.
>
> I should finally note that I was suggested (on another forum) to use the
> cleanspl XP power tool to help fix a different printer problem I was having
> on this computer. It seems it just made it worse.
>
> Help!

With most HP USB printers, you must first run the driver CD and then
when the set up requests it, connect the USB cable to the printer. Do
not connect the printer before installing the HP driver/software.

I am having the exact same issue with an HP Laserjet 1000 Series
printer. I have connected this printer to a Windows 2003 Server system
and it was printing fine. I had it shared and some other users on the
LAN were printing to it. Some of them started getting error messages
when they clicked on printer properties, so I decided that I'll just
clean up everything in the Printers and Faxes and start fresh. I used
the cleanspl.exe tool you get from "windows support tools". After I
used the tool I've been having the exact same problem as andy9999. I
dont have the USB0001 port that is usually available when adding a
printer manually and when the usb printer is attached to the system.
All the symptoms that andy9999 is describing is exactly what I am
getting. Does anyone have any suggestions on how to resolve this
problem?

Thank you,
Aqueeb.

On May 15, 8:21 am, andy9999 <andy9...@discussions.microsoft.com>
wrote:
> I cannot install a HP Deskjet D2300-series printer. The installation process
> tells me "The specified port is unknown." I try to install manually (select
> a port), and the only port options are TCP/IP port and Local Port. Where is
> the USB port???
>
> The Device Manager shows that USB Printing Support is installed (looking at
> the device manager via Devices by Connection shows the USB printing support
> connected thru the USB root hub, which looks right to me).
>
> On another computer that has a USB printer, when I look at the ports for
> that printer, it says it's connected to a 'virtual' printer port (USB001).
> On the computer with the problem, no such printer port exists.
>
> Uninstalling and reinstalling the printer doesn't help. Unplugging and
> plugging the USB cable back into the computer doesn't help. Each time, at
> the end of the installation process, I get "The specified port is unknown"
> and the install fails.
>
> I should finally note that I was suggested (on another forum) to use the
> cleanspl XP power tool to help fix a different printer problem I was having
> on this computer. It seems it just made it worse.
>
> Help!

"(E-Mail Removed)" wrote:

> I am having the exact same issue with an HP Laserjet 1000 Series
> printer. I have connected this printer to a Windows 2003 Server system
> and it was printing fine. I had it shared and some other users on the
> LAN were printing to it. Some of them started getting error messages
> when they clicked on printer properties, so I decided that I'll just
> clean up everything in the Printers and Faxes and start fresh. I used
> the cleanspl.exe tool you get from "windows support tools". After I
> used the tool I've been having the exact same problem as andy9999. I
> dont have the USB0001 port that is usually available when adding a
> printer manually and when the usb printer is attached to the system.
> All the symptoms that andy9999 is describing is exactly what I am
> getting. Does anyone have any suggestions on how to resolve this
> problem?
>
> Thank you,
> Aqueeb.
>
> On May 15, 8:21 am, andy9999 <andy9...@discussions.microsoft.com>
> wrote:
> > I cannot install a HP Deskjet D2300-series printer. The installation process
> > tells me "The specified port is unknown." I try to install manually (select
> > a port), and the only port options are TCP/IP port and Local Port. Where is
> > the USB port???
> >
> > The Device Manager shows that USB Printing Support is installed (looking at
> > the device manager via Devices by Connection shows the USB printing support
> > connected thru the USB root hub, which looks right to me).
> >
> > On another computer that has a USB printer, when I look at the ports for
> > that printer, it says it's connected to a 'virtual' printer port (USB001).
> > On the computer with the problem, no such printer port exists.
> >
> > Uninstalling and reinstalling the printer doesn't help. Unplugging and
> > plugging the USB cable back into the computer doesn't help. Each time, at
> > the end of the installation process, I get "The specified port is unknown"
> > and the install fails.
> >
> > I should finally note that I was suggested (on another forum) to use the
> > cleanspl XP power tool to help fix a different printer problem I was having
> > on this computer. It seems it just made it worse.
> >
> > Help!
>
>
>

I have been troubled by a similar problem after re-installing XP pro. I
struggled for many days before finally finding a solution to my particular
glitch.
All USB printer drivers would install but I kept getting the message "The
specified port is unknown".

My remedy was:
Run regedit. Go to
HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Print/Monitors. Look for
a USB Monitor entry. Before doing anything else, backup the registry entry by
right clicking on "Monitors" and selecting "Export". Give it a name and
locaction so that you can put it back if you have problems later. If "USB
Monitor" is not there, add it by right-clicking on Monitors, New, Key. Name
the new key "USB Monitor". Once added, right click on the new key and select
New, String Value. Name the new value "Driver". In the right portion of
regedit, right click on the new "Driver" value and select "Modify". Make the
value data "usbmon.dll". If there is an "HPUMON" entry (or the like), delete
it. Disconnect the USB cable to the printer. Run the "scrubber" or clean
utility (Cleanspl) (do not remove USB Monitor - If asked to), reboot the
machine. Reconnect the printer and install the driver software per
manufacturer instuction. This fixed my problem. Good luck and remember to
back up your registery beforehand or create a restore point!

Nobby