http://support.microsoft.com/default...b;EN-US;316524
"Administrators Only" Error Message When You Attempt to Use the Windows Update
Site
WinXP Home & WinXP Pro, Windows XP Tablet PC Edition, Windows XP Media Center
Edition, Windows Server 2003
Another cause for Administrator only message can occur if a program on your
computer is intercepting the Windows Update process.
It may be worth checking out this article
http://support.microsoft.com/default...b;en-us;241234
Windows XP Professional
Where computer software only allows "Local computer administrators" to select
"trusted publishers".
This happens regardless of whether you are the Administrator or not who is
installing the patch.
Click Start // click Run.
Type: gpedit.msc
Click OK.
Open the folder called Windows Settings which is located under Computer
Configuration, double click it.
The new options that appear directly below include Security Settings - double
click it.
The new options that appear directly below include Software Restriction
Policies - double click it.
Now on the right hand side of the window you will see an object called Trusted
Publishers - double click it and a new window appears.
In this window change the setting under Allow the following users to select
trusted publishers to the default which should be End Users.
"" <> wrote in message
news:632e01c48261$fbf2f9e0$...
> When attempting to acquire new Microsoft Windows Updates,
> I consistently receive the error message: "For
> Administrators Only".
>
> I have visited the Microsoft Troubleshooting Page, and
> applied all of the recommendations (directions) provided
> to correct this Windows Update problem. All attempts hav
> rendered negative results.
>
> I also have collaborated with three Microsoft contracted
> troubleshooters, with negative results. I have been
> unable to download Windows Updates for several months,
> and I am now worried about the in-opportunity to download
> the upcoming microsoft security update for XP that should
> resolve many future computer security issues.
>
> Help Please!!!