Cannot change Support Phone Number in Vista

I am trying to change the phone support number on the System page through the registry. I have done this on literally thousands of other domain and non-domain machines but there are a couple new ones that won't let me change it.

So I change the registry key here to read (999)123-1234:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMInformation\SupportPhone

I go here >Control Panel>System to verfiy the phone number has changed.

I then run gpupdate /force and the phone number changes back to the original (to include the registry!)
I have looked all over group policy to find if there is a security setting that is reverting this back but I can't find anything.

Does anyone know where this setting may be?
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clintonbrighamAsked:
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clintonbrighamConnect With a Mentor Author Commented:
Lee,

All the keys already exist. However, just to be sure, I deleted the entire key just to see what would happen. I ran gpupdate /force and et voila! The whole key returned. I then deleted and re-added the REG_SZ "SupportPhone" with a different phone and it still changed.  I am thinking it is a GP somewhere that's focing it back but for the life of me I can't find it. I searched every entry in Group Policy and could not find anything.
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LeeTutorConnect With a Mentor retiredCommented:
Your problem comes about because of "registry virtualization" in Windows Vista.  In order to cut down on possible damage done to the registry by malware, this concept makes all writes to the HKEY_LOCAL_MACHINE hive of the registry instead to be diverted to another path, starting with this set of keys:

HKEY_CLASSES_ROOT\VirtualStore\Machine\Software\

An informative article about registry virtualization in Vista:

http://msdn.microsoft.com/fr-fr/library/aa965884(en-us).aspx
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clintonbrighamAuthor Commented:
I checked the flags on the subkey and they are the same as other machines that retain their settings when changed:

C:\>reg flags HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMIn
formation QUERY

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMInformation
        REG_KEY_DONT_VIRTUALIZE: SET
        REG_KEY_DONT_SILENT_FAIL: CLEAR
        REG_KEY_RECURSE_FLAG: SET

I understand the concept that the registry change related to that application will be redirected to something like the HKEY_USERS\S-1-5-21-1234567890-1234567890-123456789-123456_Classes\VirtualStore\MACHINE\SOFTWARE

Currently there is nothing in any of the redirected subkeys. Is there some place else I need to look?
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LeeTutorConnect With a Mentor retiredCommented:
Interesting; didn't know about that REG_KEY_DONT_VIRTUALIZE.   I have the key you mentioned on my Vista Ultimate machine, but there is no value called SupportPhone at that location.  According to this page, you should be able to set the values you want:

http://vistasupport.mvps.org/add_logo_and_support_information.htm

You did add it as a string value (REG_SZ)?

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