Trend Micro WFBS: issues with update KB4100347

[German]Microsoft’s Intel Microcode KB4100347 update causes issues with Trend Micro Worry-Free Business Security (WFBS). After installing this update, virus protection seems no longer active.


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In blog article McAfee pulled Endpoint Security 10.5.4 August-Update a few hours ago I had reported a case with issues after installing the microcode update KB4100347 under Windows 10. According to comments, this update, which actually dates from July 2018, was also installed on machines via Windows Update in August 2018.

Trend Micro Worry-Free Business Security (WFBS) is a security solution from Trend Micro. These are cloud-based security services for Windows, Mac and mobile devices for Windows. This security solution is also available for Windows 10.

German blog reader Thomas B. has informed me by e-mail that there is an issues with the Trend Micro Worry-Free Business Security (WFBS) virus protection solution. After installing microcode update KB4100347, the WFBS virus protection no longer works under Windows 10. The following screenshot from Thomas shows the problem.

Fehlermeldung Trend Micro WFBS
(Click to zoom)

Der Trend Micro Security Agent is no longer activated, the device isn’t protected. Thomas wrote, that he got this issues on all systems, where KB4100347 has been installed. Is someone else affected?


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2 Responses to Trend Micro WFBS: issues with update KB4100347

  1. EP says:

    the July 2018 Intel microcode updates like KB4100347 have been pulled by Microsoft:
    https://www.askwoody.com/2018/patch-lady-whats-up-with-the-microcode-updates/

    MS now only offers “original” KB4100347 microcode update dated May 2018

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