Hotfix updates on Tuesday in April cause Windows to crash

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Windows Update fails

If you have installed the latest batch of Microsoft patches this week and find that your computer has started to freeze or not start, you are not alone.

The problem affects Windows 7, Windows 8.1, Windows Server 2012, and Windows Server 2012 R2 and is caused by a compatibility issue with the antivirus software. Avast, Avira, and Sophos antivirus tool users have run into problems, and Microsoft has blocked deployment of updates on some systems to help mitigate the damage.

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The Sophos software is revealed to be particularly problematic, and it is the users of such systems who will find that the updates have been blocked. In a statement, Microsoft stated: "Microsoft and Sophos have identified a problem on devices on which Sophos Endpoint Protection was installed and managed by Sophos Central or Sophos Enterprise Console (SEC), which could cause the system to crash or hang. at reboot after the installation of this update. "

In a blog post, Sophos advises against installing the updates that have caused problems (KB4493467, KB4493446, KB4493448, KB4493472, KB4493450 and KB4493451) if you have not already done so. For anyone who has already installed the updates and has a problem, the company says to proceed as follows:

  1. Start in safe mode
  2. Disable the following Sophos services:
    • Sophos Anti-Virus service
    • Sophos AutoUpdate service
  3. Boot in normal mode
  4. Uninstall Windows KB
  5. Enable the following Sophos services:
    • Sophos Anti-Virus service
    • Sophos AutoUpdate service

But it is not only the people on whom the Sophos software is installed that have encountered problems. Avast explains that Windows 7 machines running Avast for Business and CloudCare also crash at startup. The advice here is to start in safe mode and go back to a time before the installation of the updates.

Avira also issued a warning that Windows 10 could run more slowly after installing KB4493509. The same goes for Windows 7 after the installation of KB4493472 and KB4493448.

For the moment, Microsoft has only acknowledged the apparent conflict with the Sophos software and is working on a fix.

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