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Install process monitor to get a better view of that is going on:<br />
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<a href="http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx" rel="ugc nofollow">http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx</a>
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Install process monitor to get a better view of that is going on:

http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx [http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx]

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I do it. Nothing appears to be strange.<br />
Only Taskmgr process is using 20%.<br />

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I do it. Nothing appears to be strange.
Only Taskmgr process is using 20%.


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You should be able to see what is pegging the taskmgr process... once you do that kill it and see if CPU returns to normal. 
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You should be able to see what is pegging the taskmgr process... once you do that kill it and see if CPU returns to normal.

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This question has been classified as abandoned and is being closed as part of the Cleanup Program. &nbsp;See my comment at the end of the question for more details.
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This question has been classified as abandoned and is being closed as part of the Cleanup Program.  See my comment at the end of the question for more details.

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I have 3 servers (2003 physical, 2003 virtual and 2008 physical) with the same problem, all have started this last 3 week after Microsoft updates (I guess).<br />
Taskmgr is using 10-20% cpu every time and when you click any drive/directory in Explorer is very, very, very slow. None was instaled/changed (drivers, software or hardware) in this period only Microsoft updates.<br />

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I have 3 servers (2003 physical, 2003 virtual and 2008 physical) with the same problem, all have started this last 3 week after Microsoft updates (I guess).
Taskmgr is using 10-20% cpu every time and when you click any drive/directory in Explorer is very, very, very slow. None was instaled/changed (drivers, software or hardware) in this period only Microsoft updates.


Taskmgr 20% and slow Explorer

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.