Microsoft announced in July that the Windows 10 November 2019 Update would be a scoped release for selected performance improvements, enterprise features, and quality enhancements. Microsoft released the latest version of Windows 10 version 1909 on 12th November.
However, Microsoft has discovered a compatibility issue for some users. Some users had reported that they were not able to install Windows 10 version 1903/1909. According to Microsoft, this is a compatibility issue with some older versions of AVG and Avast antiviruses. Microsoft has put a hold on installing the two versions of Windows 10, so now users will not be offered to install the updates.
Microsoft has reported the issue as a Mitigated External issue. That means there is no issue with Windows 10. So any application from Avast or AVG that contains Antivirus version 19.5.4444.567 or earlier are affected. According to Microsoft, in order to install the update in Windows 10, users will need to update their antivirus first.
Microsoft has imposed a compatibility block on Windows 10 updates for versions 1903, 1909, and 1809, due to a compatibility problem with certain Qualcomm Wi-Fi drivers too. Users will see a notification for updating the driver. “To safeguard your upgrade experience, we have applied a hold on devices with affected Qualcomm driver from being offered Windows 10, version 1809, Windows 10, version 1903, or Windows 10, version 1909, until the updated driver is installed,” says Microsoft in a support page.