Supported operating system:

Windows XP 64-bit
Windows Vista 64-bit
Windows 7 64-bit
Windows Server 2003 64-bit
Windows Server 2008 64-bit

Release note:
HP Designjet 4500ps printer HP-GL/2 and HP RTL version 7.10 driver for WinXP-64/2003-64/Vista-64/2008-64/Win7-64 released on 31th July 2010.

Supported Devices:
HP Designjet 4500 HP-GL/2
HP Designjet 4500mfp HP-GL/2
HP Designjet 4500ps HP-GL/2
HP Designjet 4520 HPGL2
HP Designjet 4520mfp HPGL2
HP Designjet 4520ps HPGL2