HP LaserJet 5100 PCL Printer

If you need print double sides, you need to install Driver PCL6.
PCL6 just for Double Sides Print Module use 

19" Screen-Font size changed-Font looks like Blurry on Windows XP

If you change Font size to 14 and the color is black on 19" Monitor. Sometime  they will look like "Blurry" and the shadows are light.