Exchange VM Hangs During Updates

I haven't run into this yet, but it appears that in some cases, Hyper-V virtual machines running Exchange Server will hang when installing updates. Specifically this seems to occur when running updates for Hyper-V integration services.

There are reports of KB3037623 specifically causing this issue.
The fix is to:
  1. Disable the Exchange services
  2. Apply the update
  3. Reenable the Exchange services
This blog posting provides detailed steps:

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