Windows Server 2003 block a user to access some websites

Hi, Experts:

1. running Windows Server 2003 SBS

2. the last IT guy put a block on a computer

local hosts file not blocking; Internet option, content, no block site.  

whenever a user tries youtube, "your IT Administrator has prevented you from this URL" message shows.  login with other user name, same.  but the same user could access youtube from another workstation.

how do I remove the block.

looked around on GPO, could not find any or not knowing exacting what to look for.

Thanks in advance.
goodfinderAsked:
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GeodashCommented:
What is generating the block? When the block pops up, look at the address in the address bar of the browser.
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jdbredingCommented:
Are we talking XP,Vista, or Windows 7?
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goodfinderAuthor Commented:
workstation is windows xp pro.  thanks.
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GeodashCommented:
What is generating the block? When the block pops up, look at the address in the address bar of the browser.
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goodfinderAuthor Commented:
will go and look.  thanks.
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gke565Commented:
When you say 'Internet option, content, no block site' what does that mean?  Have you checked for non-trusted sites?
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goodfinderAuthor Commented:
yes, under 'security', 'restricted site', blank.  also, content advisor was not enable.  thanks.
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jdbredingCommented:
Is IIS installed on the server?  Is there any firewall software on the pc that has this site blocked/blacklisted?
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GeodashCommented:
Once again, when it is blocked, what is the address showing the block within the browser?
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goodfinderAuthor Commented:
the address is:  www.youtube.com
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gke565Commented:
Have you done a search in the registry for youtube?  Might be in HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\
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goodfinderAuthor Commented:
Do you think it was setup on the Group Policy Management?  I am new to that.  

what is it suppose to be at te registry?  Thanks.
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GeodashCommented:
so the address is saying youtube, but the page is showing a block page?
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goodfinderAuthor Commented:
yes.  address shows youtube.com with a "your IT Administrator has prevented you from this URL" ...:(
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gke565Commented:
Does the workstation have a reserved IP address (either static or via DHCP)?  If so try changing the IP to see if that corrects the issue.
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goodfinderAuthor Commented:
dhcp.  i will put in a static ip and try.  thanks .
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goodfinderAuthor Commented:
put in a static ip, same.  will check the registry.
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gke565Commented:
Was the static IP the same as the original DHCP address?  It should have been a different IP (at least the last octet).
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goodfinderAuthor Commented:
yes.  I tried a differnt one.  

I also tried those online proxy and just want to get around.  same message.  tried different user login, even domain administrator.  

the guy set that up is no longer with the company, no doc.

I am out of idea.  :(  

We have sonic wall, but i check every item twice, no web block or any blocking setup.  

it is frustrating.  thanks for your suggestion.
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gke565Commented:
Have you considered a fresh build of the machine?
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goodfinderAuthor Commented:
i guess that may be the last option.  wiped it clean and reload everything.  i am curious what could it be locking out youtube with this message.  we have 3 other computers like that which the management doesn't want them to.
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goodfinderAuthor Commented:
yes, but there are softwares that will take a lot of time to reload.  

if there is no further suggestion, what do i need to do?
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