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I'm administrating a small corporate network. It has a Windows 2003 SBS domain controller and about 10 client computers (Windows XP SP3 and Windows 7).

Last friday the users started complaining about a "slow network".

On some Windows XP machines the logon process is very slow. After the "Loading user settings" screen disapears the system freezes about 30 seconds. Accessing some files on a file share is slow too.

I tried to find the source, but the server load is very low and ping is perfect. There where some Updates on the day, before the issue began:

Clients: KB971929, KB2264107, KB2443685, KB2447568

Server: KB2388210, KB2264107, KB971029, KB2443685

The users also complain about a slow service that is running on a client machine.

So, what's the reason for this behavior?

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what a crappy reason for a close, how is this to localized? its just a general network/ad question? – tony roth Apr 19 '11 at 20:37
Well, I understand it, it's to special. I should have split it into multiple questions like "Reasons for slow logon", "Any problems with these Updates", ... – Michael Stoll Apr 21 '11 at 6:18
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closed as too localized by Ben Pilbrow, coredump, MDMarra, GregD, Chopper3 Apr 19 '11 at 18:19

This question is unlikely to ever help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. See the FAQ for guidance on how to improve it.

1 Answer

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There is a high probability of some type of DNS issue, that's what usually causes slow logins to a domain. Any changes in that area lately? Any errors in the server event logs?

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There's nothing special in the event log. I didn't change anything in the DNS subsystem. How can I check if this is a DNS issue? I tried nslookup for some hostnames. That worked like a charm. – Michael Stoll Apr 19 '11 at 20:04
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