As Microsoft has widely released small updates for Windows 10 Version 1909, more and more compatibility issues such as software and drivers have also been discovered. For example, both the Realtek Bluetooth drivers and the Qualcomm wireless network card driver have compatibility issues, so users must first resolve the compatibility issue before upgrading the new version. If the upgrade is not resolved before the driver compatibility issue is resolved, the system may fail to boot or some software-hardware components may become unavailable. The latest confirmed incompatibility is the old version of AVAST / AVG anti-virus software, according to Microsoft support announcements, the old version of the above anti-virus software may cause system anomalies.
Microsoft said it has blocked users from upgrading through the Windows 10 Update Assistant, the Windows 10 Media Creation Tool, and the Windows 10 Installer. When users try to upgrade using these tools, they will see the following prompt: Uninstall VAST/AVG because the software is not compatible with Windows 10 systems.
Microsoft explains: “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“.
The simplest and straightforward solution is to uninstall the above anti-virus software, and then complete the system upgrade and then re-download to install AVAST/AVG software. Both Avast and AVG have published support articles about the issue.
We recommend that you do not attempt to manually update using the Update now button or the Media Creation Tool until a new version of your Avast or AVG application has been installed and the Windows 10, version 1903 or Windows 10, version 1909 feature update has been automatically offered to you.