[aprssig] IOGear USB Adapter with AGWPE
Stephen H. Smith
wa8lmf2 at aol.com
Sun Dec 27 19:27:09 CST 2009
On 12/27/2009 4:26 PM, William McKeehan wrote:
> I believe this adapter is based on the Prolific chipset; the Hardware Id is
> Is there any way to confirm/reject that this is using a Prolific chipset? I
> can't get it to recognize the prolific drivers.
Look at the .INF file that is part of the driver install package.
Usually, somewhere in the binary gibberish, you will see a text string
that mentions the chipset vendor. (Often, end hardware mfrs take the
sample driver from the chipset vender, and just change the name in the
description string. They will often leave/overlook other references to
the original source in the INF file.)
Before installing/updating the driver, you want to delete the existing
one. In order to do this, you need to be able to reveal "Hidden
Devices" in the Windows Device Manager to select and delete the existing
instance(s) of the device. Since you will be fiddling a lot with the
Windows Device Manager, it is useful to create the following shortcut on
your Windows Desktop to go DIRECTLY to the Device Manager with one click:
Right-click the desktop and choose: "New, Shortcut". In the
resulting dialog, enter " devmgmt.msc " (without the quotes) into
the "location of the item:" box. Click "Next >" and enter "Device
Manager" in the "Name for this shortcut" dialog. You will now
have a one-click shortcut to the Device Manager.
By default, even selecting the menu item "View, Show Hidden Devices"
from the Device Manager menu won't show anything. You have to flip a
hidden "magic switch" in the Windows Registry first. Copy the
following paragraph into an empty Notepad window
Windows Registry Editor Version 5.00
Then save it as "_ShowHiddenDevices.reg_" ; i.e. not the default .TXT
extension. Double-click this saved file from the Windows File
Explorer. Windows will ask if you want to enter this data into the
Windows Registry. Say "Yes". Then reboot. [I routinely do these
two things on EVERY Windows system I set up.]
Now when you start the Device Manager and choose "View, Show Hidden
Devices" and expand the branches of the device tree, you will see
numerous items that are greyed-out. These are disconnected or
EVERY time you plug in a device like a flash drive, external hard disk,
digicam, mouse, keyboard, USB<->serial dongle, etc, Windows creates one
of these entries. If you plug the same device into a DIFFERENT port, you
will get another (duplicate) entry for the same device. If you plug
the device in via a hub, rather than directly into a root port on the
machine, you will get yet another (duplicate) entry. If you plug the
same device into a DIFFFERENT port on the hub you will get yet still
With flash drives or external hard disks, each instance creates *THREE*
entries: One in "Disk Drives", one in "Storage Volumes" AND one in
"Universal Serial Bus Controllers" as "USB Mass Storage Device". Over
time , the Registry can get clogged with DOZENS or HUNDREDS of duplicate
entries that make Windows Plug-N-Play slow down and get erratic.
(Especially if you frantically start plugging the same devices into
numerous different ports trying to "fix" problems, or if you have
several different flash drives that you randomly plug into different
ports each time.) For each one of these greyed branches, right-click the
branch and choose "Uninstall". Unlike the File Explorer, there seems to
be no way to group select these branches. You have to painstakingly
delete each branch individually.
For USB<-->Serial Dongles, there will be entries under "Ports (Serial &
Parallel)", and possibly under "Universal Serial Bus controllers" as well.
In the future, you want to make a point of ALWAYS plugging a given
device into the SAME port, or the same port of the same hub every time.
[I actually have small printed labels on my hubs calling out given ports
as "Ext HDD", "Flash drive #1", "Flatbed Scanner", "iPod", "Nikon Film
Scanner", etc.] Part of routine Windows preventive maintainence is to
periodically show these "Hidden Devices" in the Device Manager, and
delete the dead wood.
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: WA8LMF or 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.net
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