It either works like a USB keyboard, and types the letters that it scans, or it works as a serial port in which case you must connect to the com port it installs, and read the data there
Open Notepad
Plug in the scanner
Scan a barcode
Look at notepad
If notepad has nothing in it, your scanner is probably serial. I'd look for a switch to make it work like keyboard, or i'd send it back and buy a keyboard one - theyre much easier to work with