Epson STYLUS SCAN 2500 Manual page 23

Note:
To connect the Stylus Scan to a USB port, you need a standard
shielded USB cable.
13. Connect the other end of the cable to the computer's USB port.
Note:
If you have more than one USB hub connected to your computer,
connect the Stylus Scan to the hub that is connected directly to your
computer. If the Stylus Scan does not work properly when connected
to the hub, connect it directly to the computer's USB port.
14. If the following dialog box appears, click Next. Otherwise
skip to step 19.
19