We have upgraded all clients to Office 2010 so there is not need for microsoft office compatibility pack 2007 so I want to remove it.  The compatibility pack was pushed via GPO.  I was removed from GPO but "let user continue to use" was selected.  Now when trying to remove it using msiexec /qn /x{90120000-0020-0409-0000-0000000FF1CE} on almost all pcs I am getting a failure and it is not uninstalling.  MSIEXEC error code it 1605.

Error 1605 translates to - "This action is only valid for products that are currently installed." Can you perform the uninstall without using ConfigMgr?

Yes I can.

So you pushed Office 2010 without removing the compat pack first?

Here are some articles with tips you can try

http://blogs.msdn.com/b/cjacks/archive/2007/10/24/debugging-a-per-user-installation-error-on-windows-vista.aspx

http://wpkg.org/MS_Office_2007_Compatibility_Pack

http://support.microsoft.com/kb/290301

Using a login script to remove.

So not helpful.

Can someone please tell this dummy in some detail how I "use a login script" to remove the compatibility pack for 2007 office system?

Thanks!

You need to get the GUID from the registry HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall and find the entry for the program.  There should be an uninstallstring you can use in a login script.  Pass the quiet install parameters to that to automate.

I.E.

msiexec /qn /x {90120000-0020-0409-0000-0000000FF1CE}

I haven't any HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall.

But I found the key
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\000021090200A0C00000000000F01FEC\InstallProperties

with values
DisplayName     = Paquete de compatibilidad para 2007 Office system  (same product in Spanish)
UninstallString  = MsiExec.exe /X{90120000-0020-0C0A-0000-0000000FF1CE}

There is a little change in the GUI, may be related to SP3 for Compatibility Pack, which is installed. That UnistallString worked for me.

In a startup script it must include "/qn" as there is no user interaction. I.e.
msiexec /qn /x {90120000-0020-0C0A-0000-0000000FF1CE}

Yes, I do know: this thread is a year old. But may be this post help somebody :-)