Have you tried the driver install this way?:
Uniden BC125AT
Installing Drivers for the Uniden BC125AT
Step 1
Download the driver for your Uniden BC125AT
– Click here to download –
Step 2
Select Save as, then save the file to the desktop. Extract the file. In the Win7 folder, there will be a
.inf file.
Step 3
In your start menu, go to “Control Panel”
Step 4
In the Control Panel select “System”
Step 5
Select “Device Manager” (Top left)
Step 6
Turn on and plug in the Uniden BC125AT info the PC Via the USB Cable
Step 7
“Other Devices” should pop up on the list in Device Manager.
Step 8
Right click on “BC125AT” and select “Update Driver Software”
Step 9
Select “Browse my computer for driver software”.
Step 10
Click the “Browse my computer for driver software” button, find and select the
Win7 folder and then hit “Next”
You might get a Windows Security window that pops up warning you about the publisher of the software. Select-Install this driver software anyway.
Step 11
Your computer will install the drivers for the Uniden BC125AT Scanner.
Step 12
Now take a look at your “Device Manager” window you will see the “BC125AT” listed under “Ports (COM & LPT)” Once you see this you have successfully installed the drivers. Make note of which COM Port the device was installed on.
These steps above were copied (with some editing) from This Web site. Scroll down until you see
Scanner 101 – Installing PC Drivers Uniden BC125AT