Avast Antivirus compatibility with Windows update for Meltdown and Spectre vulnerabilities

As of now, Avast users of Windows 10, Windows 8.1, and Windows 7 Service Pack 1 are getting security updates automatically.

Microsoft has released a security patch for Windows 10 Version 1709 to block attempts by hackers and malware to exploit the Meltdown and Spectre vulnerability discovered in Intel x86-64 processors. The patch is included in the Cumulative Update for Windows 10 Version 1709 (KB4056892) and installs automatically using the Windows Update service, but your antivirus software must be fully compatible. For more details, refer to the following article on the Microsoft website:


The latest version of Avast Antivirus is compatible with the Cumulative Update for Windows 10 Version 1709 (KB4056892). To ensure your Avast Antivirus software is up to date, refer to the following article:

The KB4056892 update is then installed automatically using the Windows Update service. To manually check for the latest Windows updates:

  1. Right-click the Windows Start button and select Settings from the menu that appears.
  2. Click Update & security.
  3. Ensure the Windows Update tab is selected on the left side menu, then click Check for updates.
  4. Click Restart now after installing all available updates.
Click View installed update history to verify if the 2018-01 Cumulative Update for Windows 10 Version 1709 (KB4056892) has been installed.

Further recommendations

If you cannot install the KB4056892 update using Windows Update:

  • Avast Ultimate 17.x
  • Avast Premier 17.x
  • Avast Internet Security 17.x
  • Avast Pro Antivirus 17.x
  • Avast Free Antivirus 17.x
  • Microsoft Windows 10 Home / Pro / Enterprise / Education - 32 / 64-bit
  • Microsoft Windows 8.1 / Pro / Enterprise - 32 / 64-bit
  • Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate - Service Pack 1, 32 / 64-bit

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