September 21, 2020

Microsoft releases Windows 10 v1903/1909 KB4577062 Preview to fix known issues

2 min read

Microsoft has released a new test update KB4577062 to Windows 10 v1903/1909 to fix some known issues such as Internet Explorer.

As you know, this type of update is not a stable version update and therefore has a test nature. In theory, if the user does not actively click to check for the update, it will not receive it. Based on stability considerations, it is not recommended that users download and install the beta version cumulative update.

Windows 10 Build 17738

This update is only applicable to Windows 10 Version 1903 and Windows 10 Version 1909. Please do not download and install this update for other versions. After successfully installing the upgrade system version of the update are OS Builds 18362.1110 and 18363.1110.

Based on stability considerations, it is not recommended for ordinary users to download and install the update. Interested enterprise IT administrators can download and install it on test machines for evaluation.


  • Adds a notification to Internet Explorer 11 that informs users about the end of support for Adobe Flash in December 2020. For more information, see KB4581051.
  • Updates an issue that causes certain apps to go into an unwanted repair cycle. As a result, a user cannot use that app during that time.
  • Updates an issue that might display 4K high dynamic range (HDR) content darker than expected when you configure certain non-HDR systems for HDR Streaming.
  • Updates an issue to reduce the likelihood of missing fonts.
  • Updates an issue that causes a device to stop responding after you have been using a pen for several hours.
  • Reduces distortions and aberrations in Windows Mixed Reality head-mounted displays (HMD).