My OS is win 7 prof 64 bit and I have an old xerox phaser 4500 laser printer. It has held out good for a very long time, but it looks like maybe the rollers have gotton sloppy. The intake of the paper from the bottom tray ( 2nd tray) always gets jammed by not passing thru the rollers. i have looked very carefully and there are no bits of paper torn or jammed. Thus I tried installing the printer driver again from xerox web site, But while installing the driver, one of rthe screens asks for : "Enter Printer's IP address, DNS name or UNC path:" How do I find these names from my Lennovo M72e desktop pc. Thank u for your response.