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Blue screen error on startup on NUMA-based systems after installing VirusScan Enterprise 8.8 Patch 6, Host Intrusion Prevention 8.0 Patch 6, or McAfee Agent 5.0.x
Technical Articles ID:   KB85860
Last Modified:  3/27/2017


McAfee Agent (MA),,
McAfee Host Intrusion Prevention (Host IPS) 8.0 Patch 6
McAfee VirusScan Enterprise (VSE) 8.8 Patch 6
Non-uniform memory access (NUMA) processors (CPU count typically very high)


For systems with NUMA processors, which typically means CPU counts over 64, the system can encounter a continual reboot loop as the system bugchecks on startup. The crash occurs after McAfee drivers are loaded and VSE 8.8 Patch 6, Host IPS 8.0 Patch 6, or MA (,, or is installed.

VSE 8.8 Patch 6, Host IPS 8.0 Patch 6, and MA 5.0.x use the same core drivers, so this issue could occur after installing any of these products.

System Change

Installed any of the following:
  • VSE 8.8 Patch 6
  • Host IPS 8.0 Patch 6
  • MA,, or


An issue exists in the memory management code of the McAfee drivers that stems from a failure to properly map the nodes of the NUMA processors. This leads to memory being incorrectly freed, which leads to an assortment of possible blue screen error failures.


This issue is resolved in VSE 8.8 Patch 7 and Host IPS 8.0 Patch 7.

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

Updates are available when you log on to the ServicePortal at: https://support.mcafee.com/downloads.

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