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On a VMware virtual machine which has severe performance problems I can see a constant average of 20+ percent CPU load for the TASKMGR.EXE (task manager) process. The apps running on this server have lower load, around 4 to 10 percent average. The VM is running Windows 2003 Server Standard with 3.75 GB assigned RAM. I suspect that the task manager CPU load has something to do with other VM instances on the VMWare server but could not see a similar value on internal ESXi systems (the problematic VM runs in the customers IT).

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I have removed your VMware tag as VMware is a company. Please consider adding a product specific tag which can be found as vmware-product. – Iain♦ May 27 '11 at 10:42
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Well, what if you just quit the taskmanager? :-)

Every time I've seen ridiculous values for the task manager load it turned out to be swapping on the VM host due to memory shortage. Check your memory statistics on the host, especially the values of assigned and used memory and the swap used.

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This is what I tried: using the Performance Monitor to monitor the total CPU load, I can see the base CPU load of 20-22% while the taskmanager is running. If I close the taskmanager, the Performance Monitor also drops to almost zero. It looks like the taskmanager process consumes > 20% CPU load. – mjn May 29 '11 at 13:40
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