500pts 4 success) WEIRD-Adding user to local administrators group BREAKS IE6 website.

windows 2000 small business server with 7 windows xp pro clients attached.

QUICK SUMMARY OF PROBLEM

When a user is given Local Machine Administrator rights at CPUMary, things break. Perhaps there is a local machine group policy somewhere that says "Administrators are denied" from doing something? But I am a rookie at network administration, so I don't know how to find it.  I hope someone can help.  

LONG WINDED SUMMARY OF PROBLEM

One of our 7 client computers, CPUMary, gets a website Navigation Error FAR more often than it should.  (see Note 1 below.)  This is a new computer that was purchased with window xp home and upgraded to windows xp pro.

The problem happens for every user that use CPUMary, but only after their name has been added to the Local Computer Administrators group.  If I remove their name from the group, the problem goes away.

For instance, our standard computer setup procedures give the primary user administrative rights. When I set up CPUMary several weeks ago, I right clicked My Computer > manage > local users and groups > groups > administrators > and added MaryRoe.

Since then, MaryRoe has had this problem, but JohnDoe can use CPUMary with no problem.  If I add JohnDoe to local administrators, he is also broken till I remove him from group. I can't remove Mary permanently because she needs administrative priviledger for Norton Antivirus etc.  If I remove her temporarily, the navigation problem goes away.

On CPUJohn nobody has the problem-it doesn't matter if Mary or John are administrators or not.
 
HELP. Right now, I think I am going to have to reinstall windows, but I just did that 2 weeks ago, so I'm not sure it will work.  If someone can help me fix this without a reinstall, its worth 500pts.

RBerke

Note1.  If I am correct that a Deny Rule is operating, our specific web site problem is irrelevant, so I don't want you to focus on it.  But, because you'll surely want to know,  here is an explanation:

All 7 of my users frequently go to a government web site. The site is pretty smart and ENFORCES its own "previous" and "next" buttons.  If users accidentally click the IE6 standard Back and Forward buttons, the web site says "Navigation Error! Please use 'previous' and 'next' buttons, instead of your browser's navigation controls."  This is a "normal error message" which only happens when a user does something wrong.

When any user is added to CPUMary's Local Administrators Group, that user starts getting Navigation Error! on 90% of its controls even when the user did nothing wrong. It only happens on CPUMary.

Note2.  I called the website help desk. They said to remove firewall, but that did not help. They cannot offer other advise except to say that thousands of other users are not having this problem.
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rberkeConsultantAsked:
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Mr_SkinnyCommented:

Why do they need admin privs for Norton Anti-virus?
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rberkeConsultantAuthor Commented:
When I remove them from admins, everytime they send an e-mail that get an error message saying "cannot read subscription data. you may need adminstrator priviledges".

But, ignore Norton for a second. My consultant, (he is MSCE and an instructor at local college) tells me it is "best practice" to have the computer's main user user be in the LOCAL administrator group.  Naturally, it would be stupid to give them Domain administrative priviledges.  

So, before you suggest workarounds for Norton, let me know if you think his "best practice" is wrong.
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Mr_SkinnyCommented:

I would tend to agree with that, unless you really want to restrict the users.  Are all the other machines upgrades from XP home to Pro or are they full versions of Pro?
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rberkeConsultantAuthor Commented:
At least one other xp home to xp pro upgrade machine is working fine.
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Mr_SkinnyCommented:
Hmmm... this is a stange one.  I can only assume (somewhat obviously i might add!) that there is something particularly different about this machine.  Did you setup the other machines as well or just this one? and are there any diffrences in hardware/software between the problem machine and the others?

I know were not getting anywhere so far, but it would be nice to eliminate anything obvious!
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rberkeConsultantAuthor Commented:
all computers are different.  I set up most of them. Do you know anything about group policies?  Is there a way to search for every group policy that involves Administrator.

Or, is there a way to simpy print every group policy?
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Mr_SkinnyCommented:
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rberkeConsultantAuthor Commented:
Thanks, I'll look at that over the weekend
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rberkeConsultantAuthor Commented:
Turns out it had nothing to do with group policies. I reinstalled Norton Antivirus and the problem went away.

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