Windows Update fails for NIC problem.

Hello I want to know  your opinion about this:

I have a computer with 2008 R2 running hyper V.

I just installed a virtual Windows 2008 R2 but Windows update fails. this virtual NIC is connected to a Zywall Firewall. I can access Internet normally.

 The Server are recently installed and clean of another software, the firewall are down. I performed all the processes here recommended.

I changed the Zywall Firewall for another Firewall ("ovislink") of course the Firewall features are disabled.

The physical Nic is a Ethernet Gigabit DGE-528T, I have changed to a Realtek RTL8168B/8111B(NDIS 6.20) and now are updating correctly.

Is this frequently? I have to configure some NIC's feature? I'm surprised because only fails the windows update.

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Haresh NikumbhSr. Tech leadCommented:
What error you are getting in Window update ? any event id  in event viewer?
Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
Could be drivers issue or MTU size.  Have you tried updated drivers from D-Link site?

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limmontreefreeAuthor Commented:
The drivers are the windows Drivers, I'll try to update.

I can't find any relevant event  joined to the issue.
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Windows Server 2008

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