Windows Insider Program

Microsoft has released Windows 10 20H1 Insider Preview Build 18941 to Insiders in the Fast ring. This build includes various fixes, such as for a crash when searching the OneDrive folder, and a new Korean IME.

If you are a Windows Insider in the Fast ring, you can update to the Insider Preview Build 18941 by going into Settings -> Update & Security -> Windows Update and then checking for new updates.

Windows 10 Insider Preview Build 18941 (20H1)
Windows 10 Insider Preview Build 18941 (20H1)

To see the entire release notes, you can read the blog post.

Updated Korean IME

With this build, Microsoft is rolling out an updated Korean IME with the following features:

For those who’re familiar with typing in Korean, the changes will be most noticeable if you write in Hanja; we have a new candidate selection window that uses modern controls and clearer typography:

Showing the candidate window for the Korean IME.

We have also improved the algorithm used for text prediction when writing Korean using the touch keyboard. Text suggestions should now be more accurate and relevant to what you are writing.

Information about the c1900101 error when updating

Some Windows Insiders are receiving a c1900101 error when attempting to upgrade to the Windows 10 Insider builds 18936 and 18941. This will cause Windows to rollow back to the previous version of Windows that they were attempting to upgrade.

According to Microsoft, this is being caused by a "compatibility bug with a storage driver on their device". Unfortunately, there are no known workarounds at this time and Microsoft is working on a fix.

General changes, improvements, and fixes for PC

  • We fixed an issue resulting in some users experiencing a large amount of lag when using the previous flight.
  • We fixed an issue where explorer.exe would crash if you started a File Explorer search while in a OneDrive folder.
  • We fixed an issue where if you searched for advanced Windows Update options, the search result would open to the main Windows Update Settings page, rather than the advanced one.
  • We fixed an issue where Settings would crash if you clicked on the microphone section under Privacy Settings while audio recording was in progress by a Win32 application.

Known Issues

  • If you have attempted to install Build 18936 or Build 18941 and experienced install failures with error code c1900101 – see below section regarding this issue.
  • There has been an issue with older versions of anti-cheat software used with games where after updating to the latest 19H1 Insider Preview builds may cause PCs to experience crashes. We are working with partners on getting their software updated with a fix, and most games have released patches to prevent PCs from experiencing this issue. To minimize the chance of running into this issue, please make sure you are running the latest version of your games before attempting to update the operating system. We are also working with anti-cheat and game developers to resolve similar issues that may arise with the 20H1 Insider Preview builds and will work to minimize the likelihood of these issues in the future.
  • Some Realtek SD card readers are not functioning properly. We are investigating the issue.
  • Tamper Protection may be turned off in Windows Security after updating to this build. You can turn it back on. In August, Tamper Protection will return to being on by default for all Insiders.
  • On occasion, the candidate selection in prediction candidate window for the Japanese IME doesn’t match with the composition string. We are investigating the issue.

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