Supported operating system:

Windows XP 32-bit
Windows XP 64-bit
Windows Vista 32-bit
Windows Vista 64-bit
Windows 7 32-bit
Windows 7 64-bit
Windows Server 2003 32-bit
Windows Server 2003 64-bit
Windows Server 2008 32-bit
Windows Server 2008 64-bit

Release note:
HP Designjet Z6100 series pinter GL-2&RTL version 61.101.363.42 driver For WinXP/2003/2008/Win7-32&64 released on 27th July 2010.

Supported Devices:
HP Designjet Z6100 42in Photo HPGL2
HP Designjet Z6100 60in Photo HPGL2
HP Designjet Z6100ps 42in Photo HPGL2
HP Designjet Z6100ps 60in Photo HPGL2