Windows 2008 server using single core on VMware

Hi All,

Another question for today,

I have a 2008 server on a VMware ESXi box, when installed (By the last IT man) it appears to only recognise in windows a single core, I have adjusted the Vmware to have 4 cores but when I boot up the server again it shows only one core and is not recognising any more.

Any thoughts?


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have your restarted the server vm ?


what version I think only 64bit has hot add cpu
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
add another Socket (vCPU) rather than a core.

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kardell2006Sr. Cloud ConsultantCommented:
Have you upgraded the machine version and vmtools? The older versions do not respond to hot upgrades.
nullagAuthor Commented:
Thanks Guys, Hanccocka love your work.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No problems, and thanks.
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