Upgrading Server 2008 SP2 to Server 2008 R2 on my Hyper-V Host Server

I currently have server 2008 SP2 installed on my Hyper-V host server.  I would to upgrade to Server 2008 R2.  I have 5 virtual servers on this host server.  Do I just shut down the Hyper-V virtual servers and then upgrade the host to server 2008 R2?  Thanks.
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denver218Asked:
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SISAntCommented:
according to what I've read elsewhere, you need to make sure the Servers are OFF (not saved state)  and its probably best to back them up externally also. That should allow you to do the inplace upgrade.

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http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2general/thread/6e6a829a-6855-41ea-bbc7-304761bc6a63/ fo
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Darius GhassemCommented:
Having the VMs off is part of the upgrade plan that I have. You will have to reboot anyways so having them off is the best bet anyways. I believe having shutdown is required as well.
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kevinhsiehCommented:
After you do the upgrade and install Windows 2008 R2 SP1, you should upgrade the Integration Components on all of your VMs.
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Windows Server 2008

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