It goes without saying that the update released by Microsoft is entirely clean and poses no risk for the Windows 10 devices where it’s downloaded.

So, as TechDows noted, the antivirus engine keeps blocking the installation even in the case of a manual download of the update. However, given that Bitdefender issues the false positive when the installation is initiated (after the files have already been downloaded), this method doesn’t make any difference. Other users have tried to download the update from the Microsoft Update Catalog and attempt a manual installation of the patch. The easiest way to get around this problem is to just configure an exception for this Windows update, and thus avoid the files from being quarantined by Bitdefender’s antivirus engine. The threat has been successfully blocked, your device is safe. Needless to say, the device then boots back to the desktop without the update being installed, at which point they should be offered the same patch once again on Windows Update.īitdefender security software displays the following error on the affected Windows 10 devices: The antivirus engine mistakenly flags KB4574727 as a potential threat, and while the update is indeed downloaded from Windows Update, it’s blocked right when the device is restarted to complete the installation process. So essentially, KB4574727 is an important security update that users are obviously recommended to install as soon as possible, especially because it resolves vulnerabilities in Microsoft’s operating system.īut as some users figured out the hard way, installing the update on their devices isn’t possible if they’re running Bitdefender protection. And last but not least, the user security should also get a boost when running the Microsoft Office productivity suite. KB4574727 is the cumulative update that Microsoft published on September 8 for Windows 10 version 19, and given it landed on Patch Tuesday, the focus was mostly on resolving security vulnerabilities in the operating system and the built-in components.Īccording to Microsoft itself, this update included security improvements for basic operations in Windows 10, but also for peripheral devices, like mice, keyboards, and pens. One of the cumulative updates that Microsoft released as part of the September 2020 Patch Tuesday rollout to Windows 10 devices is mistakenly flagged by Bitdefender’s antivirus engine as a potential threat.

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