Information for 5nine Cloud Security and 5nine Manager Standard with Antivirus users on the Microsoft January 2018 Security Update

We are aware that Microsoft has identified the compatibility issues with antivirus vendors due to the fundamental changes of memory management with the latest Windows Security Update in January 2018.

Important information regarding the Windows security updates released on January 3, 2018 and anti-virus software:

All 5nine Cloud Security and 5nine Manager Standard with Antivirus customers automatically receive the latest signatures updates directly from the antivirus vendors' servers. You can review the current state of the security update support via the following links:




Support has confirmed when the following registry key is present on the system:

Key="HKEY_LOCAL_MACHINE" Subkey="SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat" Value="cadca5fe-87d3-4b96-b7fb-a231484277cc" Type="REG_DWORD”

Windows Security Update is only going to become available and apply to the system, once this registry key is set by the antivirus engine.



In case you don't see the registry key inside a VM, 5nine Cloud Security AP Agent host level update is going to be necessary. Please use one of the archives below for a respective antivirus engine and perform the following steps: 

1. Copy both files: "5nine.AP.Agent.msi" and "5nine.AP.Agent.msi.txt" into "<C:\Program Files (x86)\5nine\5nine Antivirus Agent>" on each Hyper-V host;

2. Use Update Definitions button from 5nine Cloud Security console to enforce the agent update, or wait till the next update cycle.


Kaspersky AV Engine:

ThreatTrack AV Engine:

Bitdefender AV Engine:





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