Access to the registry key 'Global' is denied

While giving permissions to the 'defaultAppPool' user I am getting the message 'There is no such global user or group: DefaultAppPool.' Can anyone help me here! However, using command 'net localgroup "Performance Monitor Users" DefaultAppPool /add' I am able to resolve the error but i am facing this problem in 开发者_StackOverflow社区Windows Server 2003/IIS 6.0. Here, I am always prompted as 'There is no such global user or group: DefaultAppPool.' I have also added the 'Network Service' but no avail.

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You have to add the user that your DefaultAppPool is configured to use. Check the Identity of your DefaultAppPool and add that to the Performance Monitor Users group.

Now, I can't say that correctly adding the user to the group will fix your real issue. I am getting the same error with performance counters even through my app pool users have been added to this group.