Havta re-login to access network sometimes.

Microsoft Windows vista business w/ sp1...
November 12, 2009 at 10:08:31
Specs: Windows Vista Business, Pentium 4 2.6ghz/ 25
Hi there,
i have a network in the office with a server running Small Business Server 2008, 1 desktop & 1 laptop running Vista Ultimate after being upgraded from Vista Home Premium, 1 desktop running Vista Business and a laptop running Xp Pro.
The Network setup is a router (Dir-655)with an unmanaged switch (DGS-1008D) attatched, the wireless is turned off on the router as it's not needed at the moment. There's also a USB print server (DPR-1260) attatched to the router but the problem was there before this was installed. This also has wireless turned off at the moment.
The problem i'm having is with the desktop running Vista Business.
For some reason when i start it sometimes i can't access the network and have to log out and change user then enter my username and password again and when i login i can now access the network.
This can happen at startup or randomly during the day both. Sometimes a week goes by without it happening then it might happen a few times in a few days.
Thinking it might be to do with Hibernation i've disabled it.
The network runs dhcp and the network card is configured to "Obtain ip address automatically".
Anybody got any ideas as to why this might be happening to this one pc?

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November 12, 2009 at 10:26:40
check to make sure the power saving settings for the nic card are disabled. They are enabled by default which means after a period of inactivity the system shuts the card down to "save power".

Why it happens on start up would lead me to think you have a hardware or software corruption issue.

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November 12, 2009 at 12:06:13
Hey there, cheers for the reply.
It isn't always at startup, sometimes it's just randomly during the day, but it does occur at startup so surely the power saving mode wouldn't have kicked in at this stage? I'll have a look tomorrow anyway and turn it off if it's switched on.
Any other ideas if this makes no difference?
You mention hardware and software corruption? There's not much installed on these pcs, i'll update/reinstall the drivers for the NIC while i'm at it. What else coulfd be corrupted that would cause this type of problem?

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