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Just wondering how I tell I was sure I installed a VM with R2 but it doesnt say.

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Where did you look? Right-click My Computer and get Properties. It should give you the precise edition.

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+1 Because I don't think we should forget to check the basics first. – HostBits Apr 2 '11 at 7:25
Correct and confirmed on one of my 2K3 R2 boxes. – Ethos Apr 6 '11 at 10:01

Click start then run and type WINVER and hit enter. It will tell you if it is R2.

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Start -> Run -> winver.exe from within Windows or click on the Summary tab in the vSphere client to see what you selected (but not necessarily what is installed)

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If you're looking for a programmatic way to do it, you can use PowerShell and WMI to get the same string as in My Computer -> Properties...

powershell -command "$str = (gwmi win32_operatingsystem).name; $str -like '*R2*'"

(True if R2, false if not R2)

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