Opticon OPN 2001 User Manual page 9

When the battery is completely empty, it can take a while before it is charged
enough to power the scanner and thus for Windows to notice that the scanner
has been connected.
When the scanner is connected to the PC for the first time, Windows will show
you a dialog box, telling you that it has found new hardware - a barcode scanner
- and that driver software is required:
Keep the selection to "Install the software automatically" and click on the Next
button. The software will be installed and when the following screen is shown, a
click on the Finish button finalizes the installation:
OPN 2001 OPTICON - 9