Download Windows 10 KB4487021 to fix major region-specific bugs


Milan Stanojevic
by Milan Stanojevic
Deputy Editor
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Microsoft announced a bunch of cumulative updates for various versions of Windows 10. The updates were rolled out to all the Windows 10 Enterprise editions version 1607 and 1703  on February 19, 2019. 

These updates do not deal with security and this time they have been released to fix stability and other issues that existed in the previous versions. Just like KB4487021, this time KB4487021 also brings quality improvements and bug fixes.

Microsoft states that this update resolves at least 13 errors have existed in the previous versions. Most of the issues affected users of Japanese devices. 

KB4487021 improvements and fixes

The clock and the calendar flyout Issue

The update fixes a bug that involves user settings being ignored by the clock and the calendar flyout for date and time formats for Japanese era. The problem was first reported in KB4469068. 

Japanese era name problem

A bug was reported in Microsoft Office Visual Basic applications during the previous releases. It was causing the first character of the Japanese era name to be broken down. 

Furthermore, the following fixes and improvements have been listed in the detailed changelog:

  • Updates time zone information for Chile. 
  • Addresses an issue with evaluating the compatibility status of the Windows ecosystem to help ensure application and device compatibility for all updates to Windows. 
  • Adds a new group policy called “Policy Details”. This policy will immediately disconnect any wireless connections when a wired connection is detected and “Minimize simultaneous connections” is configured.
  • Addresses an issue that causes the clock and the calendar flyout to ignore user settings for Japanese era date and time formats. For more information, see KB4469068.
  • Addresses an issue that can overwrite gan-nen support behavior for the Japanese era with a newer update. For more information, see KB4469068.
  • Enables the 元年 character for the first year in the Japanese era. For more information, see KB4469068.
  • Addresses an issue that fails to display the correct Japanese era name in Microsoft Office Visual Basic for Applications. For more information, see KB4469068.
  • Addresses an issue that fails to recognize the first character of the Japanese era name as an abbreviation and may cause date parsing issues.
  • Addresses an issue that may prevent Internet Explorer from loading images that have a backslash () in their relative source path.
  • Addresses an issue that may cause applications that use a Microsoft Jet database with the Microsoft Access 95 file format to randomly stop working.

KB4487021 Known Issues

The OS build number is increased to 16299.1004 in KB4487021. It is worth mentioning that it seems like Microsoft is working hard this time on these cumulative updates. As of now, no bugs have been reported. Therefore, no errors are expected during the installation of the updates.

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