Windows 7 PC's Connectivity Issues to SBS 2008 DC

I have a network which has been working perfectly fine, an SBS 2008 server is the DC and the workstations are XP Pro.

I have introduced two PC's that have Windows 7 Pro and 80% of the time when the users logon using usernames that work fine on XP they are unable to access Internet/Microsoft Outlook 2007/Microsoft Navision.

Numerous restarts will eventually allow access to the above.

Local programs work fine and I can ping the DC / websites both IP & www address / router
deltacomputingAsked:
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CompProbSolvCommented:
What are the DNS settings for the Windows 7 Pro box?  It should point to the SBS 2008 box only (and the SBS box should be doing DNS).
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deltacomputingAuthor Commented:
I have tried automatic DNS and Manual DNS of the DC on Windows 7 in the Network Connections.

I have also tried manual IP address & IPv4 only on Windows 7 box .

DC is doing DNS.
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IanThCommented:
are the windows 7 pc's using ip v6 on the windows 7 pc run ping local host if you get ::1 from local host its in ip v6 mode
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deltacomputingAuthor Commented:
ping localhost gives me ::1

This is with v6 unticked in the network settings.

How can I force v4
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deltacomputingAuthor Commented:
or enable dc to run v6 properly
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xmlmagicianCommented:
have you tried to give them static IP addresses with all the correct settings? Try that and let me know how it works out?
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deltacomputingAuthor Commented:
I have tried v4 with static IP address with no difference
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IanThCommented:
sorry thought you where using 2003

see
http://www.itechtalk.com/thread1600.html

for 2008
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deltacomputingAuthor Commented:
Update on testing:

I have 2 identical Window 7 PC's that are having this problem.
I took a 3rd PC different mobo / NIC and reformatted to Windows 7, this works perfectly
I then reformatted one of the Windows 7 PC's that I have a problem with and loaded XP Pro
The PC now works fine

Based on this testing I would surmise it is a problem with Windows 7 drivers for the mobo / NIC
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deltacomputingAuthor Commented:
Now the 3rd Windows PC has developed the problem after several restarts.

I will pursue the links
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IanThCommented:
windows 7 does have driver issues
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deltacomputingAuthor Commented:
I can get the windows 7 PC's to work everytime by unticking IPv4 in the Network Adapter properties restarting the PC and then ticking IPv4 after logon.

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deltacomputingAuthor Commented:
For future reference Windows 7 Service Pack 1 fixed problem
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deltacomputingAuthor Commented:
Solution worked
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