Installing Optional KB4577062 blocks Windows 10 Upgrades

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Microsoft says that customers who install the optional KB4577062 update for Windows 10 versions 1903 and 1909 will encounter issues upgrading to newer Windows 10 versions on some devices.
KB4577062 was released on September 16, 2020, with the main highlight being that it enables an Internet Explorer 11 notification to inform users about Adobe Flash's end of support in December 2020.

Windows 10 upgrades blocked after installing KB4577062

Microsoft says that customers who install the optional KB4577062 update for Windows 10 versions 1903 and 1909 will encounter issues upgrading to newer Windows 10 versions on some devices.

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