OPERATIONAL DEFECT DATABASE
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Guest VMs will fail to engage VSS when Application-Aware Processing is enabled, generating the error: Error Guest processing skipped (check guest OS VSS state and integration components version) (System.Exception)
Most Common Solution At the time this article was written in 2014, resolving this error required checking several factors, which are still listed below as they may continue to impact Hyper-V checkpoint operations. In recent years, however, most issues can be resolved by either: Rebooting the VM's Guest OS. or Restarting the "Hyper-V Volume Shadow Copy Requestor" service within the VM's Guest OS. (If the service does not start, verify that the Backup option is enabled in the VM's Integration Services settings.) If the problem persists, please review the additional information provided in the remainder of the article below.
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