Microsoft has added a new feature that will block Windows 10 updates to a newer version if it detects that users are using old version of Avast antivirus software or AVG Antivirus. You cannot upgrade Windows 10 with any tool, even Windows Update without updating the antivirus software to the latest version.
Specifically, if you are using AVG or Avast Antivirus applications versions 19.5.4444.567 and earlier, you will not be able to install Windows 10 May 2019 Update (1903) and November 2019 Update (1909). The reason given by Microsoft is as follows:
“Microsoft and Avast have identified compatibility issues between several versions of Avast Antivirus as well as AVG Antivirus and Windows 10 versions 1903 and 1909. Any Avast or AVG Antivirus applications version 19.5.4444.567 and earlier were affected, so the decision to lock the update to the new version on Windows 10 will be applied until users upgrade their antivirus software to a newer version to ensure that back to you the most optimal experience ”.
AVG also issued a similar notice:
“Starting November 2019, the AVG Antivirus app version 19.5 and below will no longer be compatible with Windows 10 version 1903 (May 2019 Update). Before your PC can update to this version of Windows 10, Set up dialog box will display the applications you need top attention. If AVG Antivirus appears in this dialog box, please refer to the related instructions below to install the latest version of AVG Antivirus “.