Microsoft has issued a warning regarding a security vulnerability impacting fresh Windows installations. This issue, linked to outdated antimalware binaries in installation images, creates a “Microsoft Defender protection gap.”
Why Outdated Images Are Risky
Installing Windows from an outdated image can lead to incomplete protection from Microsoft Defender. Users won’t receive full security measures immediately as the device waits for the latest updates and patches from Windows Update. This delay poses a significant threat in the early hours after setup, when the system is most vulnerable.
Additionally, third-party antivirus software users are also at risk since Defender manages several core functions. According to Microsoft, updated Defender binaries enhance both security and system performance.
Microsoft Recommends Quarterly Updates
To minimize potential risks, Microsoft advises IT administrators and users to update their installation images every three months, covering Windows 11, Windows 10 (Home, Pro, and Enterprise), and Windows Server (2016, 2019, and 2022).
Updating the installation image involves injecting the latest Defender binaries using PowerShell, with Microsoft providing detailed instructions for manual updates. This practice is especially beneficial for those managing virtual machines, setting up new PCs, or frequently reinstalling Windows. By keeping the image files current, users can ensure that Defender’s protection activates promptly, eliminating any gaps in security.
For further information, visit Microsoft Windows Defender.
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