Windows Server 2008 R2 - Won't load certain web pages

Users are unable to access certain websites from either of our RDP session servers (Windows Server 2008 R2 Standard with SP1).
1.) I have tried machines that are not connected to this server (not thin client or RDP), but are on the same network, they can load up any web page fine with no issues.
2.) On the server I have tried Opera, Chrome, IE and Firefox, all have the same exact problem.
3.) Tried different DNS servers just to be sure, even though it only effects the server and no one else.
Based on these facts I know that it is something wrong with the server, but not tied to a specific brower. In all browsers when you load up a page in question it just sits there with a blank screen trying to load, it never generates any errors.
The Event Viewer is also clean, no errors. So with no errors I have had trouble trying to find a starting place for this. Things I have tried:
1.) ipconfig /flushdns to try and clear out any DNS issues
2.) Changing the DNS servers for the server to 8.8.8.8 and 4.2.2.2
3.) Scanning for Viruses and Malware/Spyware
4.) Checking proxy settings on the server
5.) Updating and then removing Adobe Flash (thought it was tied to flash at first). Problem persists even with no flash player installed.
6.) Completed a failed update of .net, no effect
7.) Loading up browsers in debug mode to try and find anything in the site code that I could relate between failed sites. I found nothing I could identify
Of all issues to finally be stumped on this seems like an easy one, but I can't even begin to come up with an idea at this point.
Help is most appreciated, thank you!

Hi,
Extension Mechanisms for DNS (EDNS0 as defined in RFC 2671) allow DNS requestors to advertise the size of their UDP packets and facilitate the transfer of packets larger than
512 octets, the original DNS restriction for UDP packet size (RFC 1035).
But this would cause drop packets because of some DNS servers or hosts don’t support this. This always causes some website inaccessible.
Using Extension Mechanisms for DNS (EDNS0)
http://technet.microsoft.com/en-us/library/cc785769(v=ws.10).aspx
Nslookup, can you get the name resolved?
In addition, try use IP address access the website and check the result.
Hope this helps.

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Windows Server 2008 R2 - Won't load certain web pages - Happens in all browers - Won't do windows updates

This server (Windows Server 2008 R2 Standard with SP1) is used to host thin clients as well as RDP sessions. One morning the office is fine, they come back from lunch and all of the sudden they can't load certain web pages, such as adobe.com
and pandora.com to name a couple. This was roughly 3 days ago.
1.) I have tried machines that are not connected to this server (not thin client or RDP), but are on the same network, they can load up any web page fine with no issues.
2.) On the server I have tried Opera, Chrome, IE and Firefox, all have the same exact problem.
3.) Tried different DNS servers just to be sure, even though it only effects the server and no one else.
Based on these facts I know that it is something wrong with the server, but not tied to a specific brower. In all browsers when you load up a page in question it just sits there with a blank screen trying to load, it never generates any errors.
The Event Viewer is also clean, no errors. So with no errors I have had trouble trying to find a starting place for this. Things I have tried:
1.) ipconfig /flushdns to try and clear out any DNS issues
2.) Changing the DNS servers for the server to 8.8.8.8 and 4.2.2.2
3.) Scanning for Viruses and Malware/Spyware
4.) Checking proxy settings on the server
5.) Updating and then removing Adobe Flash (thought it was tied to flash at first). Problem persists even with no flash player installed.
6.) Completed a failed update of .net, no effect
7.) Loading up browsers in debug mode to try and find anything in the site code that I could relate between failed sites. I found nothing I could identify
Of all issues to finally be stumped on this seems like an easy one, but I can't even begin to come up with an idea at this point.
I have tried to lay out all of the facts that I know as plainly as I can. I am hoping that someone has seen this before as this issue is effecting a number of differnt users and keeping them from doing portions of their job.
Help is most appreciated, thank you!

I was able to figure out a solution.
CAUSE:
It appears that the Internet isn’t fully up to date and ready to use EDns -- which is enabled on Windows Server 2008 R2 by default. The solution for this is to disable Edns. Note that this isn’t
a problem for most Windows Server 2008 R2 member servers. It’s only a problem for DNS *servers* that do recursive lookups. i.e. likely only your domain controller will be affected if that is where your DNS Server role exists.
SOLUTION:
To disable EDns, you can do it from the command prompt, or by editing the registry.
Create a DWORD called EnableEDNSProbes and set to 0 in HKLM\SYSTEM\CurrentControlSet\services\DNS\Parameters
Restart the DNS Server service for it to take effect.

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HT1338 Why is safarai loading certain web pages so slowly?

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Hi,
2014-05-14
14:30:03:921 5336   16a8
Handler         MSP Error List:
2014-05-14
14:30:03:921 5336   16a8
Handler         1: 1325 2: administrator
2014-05-14
14:30:03:921 5336   16a8
Handler
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2014-05-14
14:30:03:921 5336   16a8
Handler
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2014-05-14
14:30:03:922 1148   1878
AU      >>##
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2014-05-14
14:30:03:922 1148   1878
AU      # WARNING: Install failed, error = 0x80070643 / 0x0000052D
2014-05-14
14:30:03:922 5336   16a8
Handler
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http://social.technet.microsoft.com/Forums/windowsserver/en-US/4f64bcbe-54dc-4e66-a83c-dfc2cdc0fb7e/what-causes-error-0x80070643-0x0000052d-
Error 0x80070643 with Office 2010 Patches KB2553065 KB2584066 KB2553091
http://social.technet.microsoft.com/Forums/windowsserver/en-US/df31233e-fdd8-4c2f-b0db-6767cd4a0822/error-0x80070643-with-office-2010-patches-kb2553065-kb2584066-kb2553091?forum=winserverwsus
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http://support.microsoft.com/kb/903774
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Reset Safari.
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Windows Server 2008 R2 - Won't load certain web pages

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