Task Manager shows 100% cpu usage in VMware Guest Server

Hi,  I'm running a WIndows 2012 Virtual Server with 4GB and 1 CPU allocated (standard allocation settings) on ESXi 5.1.

It's a WSUS server with the Database on another PC, so it doesnt do that much.

Looking at the Windows Resource Monitor it's not doing a lot but on the Windows Task Manager it's running at 100%.  Is this normal?
jmsjmsAsked:
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jmsjmsConnect With a Mentor Author Commented:
Sorry about reply delay, I've just noticed that the task manager graph has "paused" underneath it.  

After a little search I found that you can unpause the CPU graph in Task Manager by using the View menu and selecting from the update speed sub menu.  

This resolved the issue.

You comment made me think a bit harder about the issue so I'll mark it as a solution with the points.  Many thanks.
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Zephyr ICTCloud ArchitectCommented:
What exactly is using 100% and of what? CPU or Memory? Maybe you can post screenshots?
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Haresh NikumbhSr. Tech leadCommented:
Sort task manager and share screenshot to understand which process is taking utilization
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jmsjmsAuthor Commented:
Just checked again and task manager is 86.7% CPU in Task Manager list.  Looking at details everything is at 0%.  THe CPu Graph is at 100% and doesnt seem to be moving.

In Resource Monitor there's 1-2% usage and nothing shows up on CPU usage.  The Graph just bumbles along at the bottom.
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Haresh NikumbhSr. Tech leadCommented:
Where this VM is stored local datastore or you are using san or nas?
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Haresh NikumbhSr. Tech leadCommented:
Can you please upload screen shot for task manger?
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Haresh NikumbhSr. Tech leadCommented:
Also check network utilization if that is normal ?
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jmsjmsAuthor Commented:
Here's some pics.  THe network tab is showing 9% utilisation.

Data is stored locally.
TaskManagerProcesses.png
TaskManagerVResourceManager.png
TasmManager100percent.png
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Haresh NikumbhSr. Tech leadCommented:
Looks like its bug with Task manager on Windows 2012

Install below Kb and then reboot and verify again

KB which need to install on WS2012


Reference
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jmsjmsAuthor Commented:
This one is already installed on the Server Feb 2012 and the server has been rebooted serveral times since then. :-(
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Aaron TomoskySD-WAN SimplifiedCommented:
Is the machine sluggish? Vmware shares CPU slices so the machine has a floating MHz internally. What does the vsphere console show for vm CPU usage?
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Gerald ConnollyConnect With a Mentor Commented:
As the trace only just seems to have just started this spike could just be task manager starting up, does taskmanager run @100% continuosly - dont get confused between the processor running at 100% and the CPU being 100% used.
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jmsjmsAuthor Commented:
My comment was the solution. Geralds comment was a good prompt so I awarded all points to him.
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