Brother HL-1250 - Manual (Page 12)

Steps 5 Setting your PC Printer port
1. After your PC has restarted, click
Start and select Printers in Settings.
2. Select your printer model icon in
Printers.
3. Select Properties from the File
menu.
4. Click the Details tab. Select
BRUSB:(USB Printer Port) in the
"Print to the following port" box.
Click the
OK button. The setup is
now completed.