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Windows 2003 SP1 servers and Win XP Pro PC's and Laptops that are randomly disconnecting from the Network.

I have 2 Win 2003 SP1 servers that randomly disconnect from the network (ie they loose ALL network connectivity). When you try and disable the NIC the window hangs. Only a reboot of the server corrects the issue. I have serveral PC's and Laptops doing similar things on a seperate LAN. but thier disconnects are more frequent and the connection comes right after a few minutes without a reboot. I have changed Physical network points as well as moved them to different switches, I have ran all the windows updates and security releases, reloaded the NICs and replaced them. in fact  on the PC LAN I have physically replaced the PC and same problem occurs! now the server and PC probs may not be related but the symtoms are too similar to ignore. I'm running out of ideas and I am getting a little anxious!! :-(
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Sourcing
Asked:
Sourcing
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Jay_Jay70Commented:
Hi Sourcing,

are all your machines connected to the same switch?
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SourcingAuthor Commented:
The 2 servers are on the same switch but the PC's are on a Pysically seperate LAN, I doubt the problems are interrealted. The servers have just disconnected this morning again, I will post the events from the log at the time of discconnect.
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SunshineVKCommented:
Pls can u check the Link Speed (10 MBPS/100 MBPS) & the Type (i.e. Duplex etc) on the server NIC & revert.
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SourcingAuthor Commented:
links are all set to auto and they are connected to a gig switch
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SourcingAuthor Commented:
I recieve EventID 1053 Userenv just before or during the problem
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SunshineVKCommented:
Have u tried reapplying the servicepack on the server?
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SourcingAuthor Commented:
no I haven't. why do you say the service pack could be an issue?
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Jay_Jay70Commented:
1053 and anything else?
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SourcingAuthor Commented:
Yea I did go and look at that link already but I didn't find something that I can say sounds like the problem I'm getting. I think the Userenv error are as a result of the network dissconnect and not the cause!
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SourcingAuthor Commented:
Looks like the service pack reapply worked!!!  Thanx for all the help :-)
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