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Hyper-V VMs using pass-through disks do not boot after installing VirusScan Enterprise 8.8 Patch 5
Technical Articles ID:   KB84987
Last Modified:  3/27/2017


McAfee VirusScan Enterprise (VSE) 8.8 Patch 5

Microsoft Hyper-V


VM systems that use the Hyper-V platform with pass-through disks may not boot after VSE 8.8 Patch 5 is installed.

System Change

VSE 8.8 Patch 5 was installed.


This issue is resolved in VSE 8.8 Patch 6.

Patches are cumulative; Technical Support recommends that you install the latest one.



Disable the mfedisk.sys driver in the registry:

  1. Back up your registry.
  2. Navigate to the following key, and modify the UpperFilters value by removing ONLY mfedisk in the string:  
  3. Reboot the system.



The content of this article originated in English. If there are differences between the English content and its translation, the English content is always the most accurate. Some of this content has been provided using Machine Translation translated by Microsoft.

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