I have four VM's running on a Windows Server 2008 R2 box - not 'core.' What is the best way to install Windows Updates on that server? Do I need to shut the VM's down first in case it wants a reboot? Is there a way to configure Windows Updates to do the shutdown itself?


WIndows saves the VM's then restarts. If saving takes too long some vm's just fail and restart from cold boot.

Server 8 can - in a cluster - empty the machine by moving the VM's over first, but that is not in standard 2008 R2, sadly.

We do save / shutdown before upating the virtual servers. But we only have three.

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  • I did an experiment this morning as I ran updates on the VM host server. I paused & took snapshots of all the VM's before rebooting. When the server came back up all the VM's woke up too with no ill effects. – n8wrl Mar 17 '12 at 13:44
  • Small? I have al arger server and we sometimes get a rese here and there - possibly a timeout saving all the vm's. – TomTom Mar 17 '12 at 16:46

Assuming that you are working in a Hyper-V cluster you'll want to manually move all the guests from the host to another host then patch the host.

If you are in a standalone config you'll want to down the guests then patch the server.

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