John,
I don't think your problem is related to the monitoring templates. It looks as if you're getting this error during modeling of the device related to the operating system version somehow not being found with the WMI call. Not sure why that is since I'm not seeing this issue with our latest development effort.
We (Zenoss) are currently working on a new Windows ZenPack that utilizes WinRM and WinRS to manage your Windows boxes. You can download our lastest work at https://github.com/zenoss/ZenPacks.zenoss.Microsoft.Windows .
We are making several changes based off of user feedback so please test and post issues as you see necessary.
I would be curious if you're seeing this same issue with the new ZenPack.
-Rob