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Windows 2003 SBS Constantly logging Security Events

I have a Windows 2003 SBS that is really slow serving clients. There are only 10 clients on the network and the often have to wait 1-2 minutes to open up a word document.  I looked thru the event log and the first glaring strange thing was that event id's 576, 540, and 538 are constantly coming up in the Security Audit Log.  When I say constantly I mean every 45-60 seconds.  Any idea's on why these are happening and if they might be causing the Server to respond slowly to network requests.
1 Solution
did you already update the NIC of the server drivers?
also client nic driver updates
please post an ipconfig /all from the server and the clients please.
slow networks are commonly caused by improper DNS settings. Double check that all client computers are pointing to your internal DNS server, in this case it's most likely your 2003 SBS, and nothing else. Then your DNS server should point to itself for DNS, again nothing else. Then in DNS (in administrative tools) you can set your ISP's DNS server as a forwarder. That way, your DNS server will only forward to your ISP if it can't resolve.

Hope this helps.
degoodwinAuthor Commented:
I reset all the DNS settings and reconfigured the network and it seems to be working much better. Thanks. I figrued it was a DNS setting, just wnated to see if anyone had any other thoughts.
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