For the HP LaserJet 3100 and 3150 series products, HP recommends using the latest software to obtain full functionality in Microsoft Windows XP. HP has verified that the latest software will work in Microsoft Windows XP. However, these drivers are not certified for use within the Microsoft Windows XP environment, causing a digital signature warning message to appear upon installation.
HP LaserJet 3100 series products
There are no Windows XP drivers available for the LaserJet 3100.
HP LaserJet 3150 series products
Version 197D or later of the product software is required for proper functionality within Windows XP. The drivers and some of the software will not be available for download from the Web due to licensing restrictions and size. To install the entire product software, including drivers, it will be necessary to use the CD that shipped with the printer.
note:However a Host-based printer driver is available at the HP website for HP LaserJet 3150 series printers.