Receiving Error number: 0x80072EFD on my Windows 2003 Server - Cannot update Windows

I have tried absolutely everything I can find online, including http://support.microsoft.com/kb/83694, to solve my problem. I am receiving Error number: 0x80072EFD when trying to update my Windows Server 2003 machine. Windows Defender also cannot pull in any updates.

The machine is a backup Exchange 2003 server. I have disabled Norton Antivirus file protection, run a full scan with updated Norton antivirus defs, run Malwarebytes, manually updated Windows Defender defs and ran a full scan, and nothing seems to help. Windows firewall is also turned off.

I'm stumped.
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alan2938Asked:
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alan2938Connect With a Mentor Author Commented:
Nothing is working and this thread seems to be dead. I am going to close and re-post in hopes of getting some fresh thoughts on the subject.
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BembiCEOCommented:
I assume, that this server has full access rights to the internet, right?

Have you see this:
http://support.microsoft.com/kb/308565/en-us

Have you tried to run windows update, this may install a newer update client.
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Ehab SalemIT ManagerCommented:
If you are connecting thru ISA to the internet, you need to open the way to the windows update servers. ISA sometimes blocks windows update, specially on Windows server machines.
See:
http://support.microsoft.com/kb/885819 
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alan2938Author Commented:
Bembi, yes. This server has full access to the internet. Windows Update is also what I am trying to reach when I receive that error. I just added the info about Windows Defender because it is related to whatever my issue is.

Ehabsalem, I am not using ISA. My systems go straight out the internet gateway.
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BembiCEOCommented:
Seen this?
http://support.microsoft.com/kb/918355

Are there relevant information in the Windowsupdate.log file?

Other hints:
Does your browser uses automatic proxy detection? If yes, disable it and try again.
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