http://www.hp.com/supporthttp://windows.microsoft.com/en-us/windows7/help Microsoft supports the Windows 7 software under Microsoft warranty terms. However, HP continues to support your PC hardware under the terms of your PC's limited warranty.
If you received a Windows 7 Upgrade DVD through the Windows 7 Upgrade Option Program from HP and you need assistance beyond these instructions, please contact HP by visiting www.hp.com/go/contacthp.
HP recommends that you back up all user data and burn or locate your system recovery disks before beginning any upgrade or re-installation.
List of Tested Systems
The following HP Personal Workstations are supported for upgrade to Windows 7.
Personal Workstations
HP Z400 Workstation
HP Z600 Workstation
HP Z800 Workstation
HP xw4600 Workstation
HP xw6600 Workstation
HP xw8600 Workstation
HP xw9400 Workstation
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More...
If you received a Windows 7 Upgrade DVD through the Windows 7 Upgrade Option Program from HP and you need assistance beyond these instructions, please contact HP by visiting www.hp.com/go/contacthp.
HP recommends that you back up all user data and burn or locate your system recovery disks before beginning any upgrade or re-installation.
List of Tested Systems
The following HP Personal Workstations are supported for upgrade to Windows 7.
Personal Workstations
HP Z400 Workstation
HP Z600 Workstation
HP Z800 Workstation
HP xw4600 Workstation
HP xw6600 Workstation
HP xw8600 Workstation
HP xw9400 Workstation
read more
More...