[German]Microsoft blocks the upgrade to Windows 10 version 1903 and Windows 10 version 1909 if the system has older versions of Avast and AVG antivirus software installed.
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When upgrading a Windows 10 system to the new version 1903 (May 2019 Update) or version 1909 (November 2019 Update), there may be several issues. Microsoft will then set an upgrade stopper for known issues. Microsoft maintains a list of known issues for Windows 10 (V1809 to 1909) which is available here.
Avast/AVG as Upgrade Blocker
On the status page, Microsoft has now made added some entries for Windows 10 Version 1903 and Windows 10 Version 1909 as of November 22, 2019 for systems with Avast/AVG.
Issues with some older versions of Avast and AVG anti-virus products
Microsoft and Avast has identified compatibility issues with some versions of Avast Antivirus and AVG Antivirus. Any application from Avast or AVG that contains Antivirus version 19.5.4444.567 or earlier is affected.
As a precaution, Microsoft has stopped the delivery of feature updates for Windows 10 version 1903 and Windows 10 version 1909 if the affected antivirus version of Avast and AVG is found there. Affected:
- Client: Windows 10, Version 1909; Windows 10, Version 1903
- Server: Windows Server, Version 1909; Windows Server, Version 1903
As a workaround, Microsoft recommends that you download and install an updated version of the Avast or AVG application before updating to Windows 10, version 1903 or Windows 10, version 1909. Instructions for Avast and AVG customers can be found in the following support articles:
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Microsoft does not recommend attempting a manual update via the Update Now button or using the Media Creation Tool until a new version of Avast or AVG application has been installed. Then the feature update for Windows 10 version 1903 or Windows 10 version 1909 should be offered automatically. (via)
Similar articles:
Windows 10 V1903: Known Issues – Part 1
Windows 10 V1903: Known Issues – Part 2
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