On January 3, 2018, Microsoft began to release its monthly Security Bulletin early due to the newly revealed CPU security flaws. Microsoft's January 2018 monthly update implements new requirements to ensure that security and anti-virus software is compatible.

Information has recently been released about a set of vulnerabilities commonly referred to as Meltdown and Spectre that could be exploited at a hardware (CPU) layer on multiple operating systems including Microsoft Windows, Linux, and Apple macOS.

Customers running any version of Trend Micro Security will require a new Microsoft Windows registry key to allow the Windows Update to automatically occur. Microsoft is not providing a tool to add this registry key, therefore Trend Micro is offering several options, to ensure customers are able to receive the January Microsoft patches as quickly possible in conjunction with Trend Micro security software deployment.


  • Make sure you are using the latest version of Trend Micro Security:
    1. Update to the latest version of Trend Micro Security to stay safe from Meltdown and Spectre vulnerability.
      You can check here if you already have the latest version or follow instructions here to upgrade Trend Micro Security to the latest version.
    2. Make sure your Trend Micro Security has the latest Security and Program updates.
      You can check here to manually update your Trend Micro Security.
  • Download and run ALLOW REGKEY.reg to let Windows receive 2018 1B update:
    1. Back up your Windows System Registry.
    2. Download ALLOW by clicking the download button below:

      Download ALLOW
    3. Unzip ALLOW, then run the file.
    4. Click Yes when the User Account Control window appears.
    5. Click OK.
  • Manually add the Registry Key.
    1. Back up your Windows System Registry.
    2. On your keyboard, press the Windows + R keys.
    3. In the Open field, type "regedit", then press ENTER. The Registry Editor window should open.
    4. Add the following Registry Key:
      • RegKey=HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\QualityCompat
      • Value Name =cadca5fe-87d3-4b96-b7fb-a231484277cc
      • Type=REG_DWORD
      • Data=0x00000000
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