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 Color LaserJet CP4005 pinter PCL 6 version 5.1.0.77 driver for WinXP-64/2003-64/Vista-64/2008-64/Win7-64 released on 27th July 2010.

Supported Devices:
HP Universal Printing PCL 6