What’s in the Windows 10 May Update? (KB5013942)

The May 2022 Update KB5013942 for Windows 10 is now available through Windows Update and brings several improvements and bug fixes. This May 2022 Update Tuesday, the focus was more on fixing bugs and vulnerabilities than user-centric improvements.

The Windows 10 May 2022 Update includes 75 vulnerability fixes, eight of which are rated “critical” due to the System Control privilege level. According to Microsoft’s report, 21 security issues that increase the level of operating system access privileges have been resolved, in addition to 26 bugs that allow remote execution via code.

In addition to the security fixes mentioned above, Microsoft cited three “zero-day” bugs, including one related to the NTLM relay attack, where the attacker uses the “call” method and, via the LSARPC interface, performs authentication using NTLM.

It is important to remember that this new update is automatic, that is, if you do not select the button to download it in Windows Update, the download and installation will take place automatically sooner or later. .

If you check for updates on Windows Update today, the following fix will appear:

2022-05 Cumulative Update for Windows 10 Version 21H2 for X64-based operating systems (KB5013942)


Screenshot of Windows 10 version 21H2 update KB5013942. Source: Victor Valeri

Note that Windows 10 builds will be different across OS versions (21H2, 21H1, 20H2, and 2004), but the changes in this update are the same in all cases. Below are Windows 10 May 2022 Cumulative Updates and their releases with respective releases:

  • KB5013963 (Build 10240.19297) for version 1507.
  • KB5013952 (Build 14393.5125) for version 1607.
  • KB5013941 (Build 17763.2928) for version 1809.
  • KB5013945 (Build 18363.2274) for version 1909.
  • KB5013942 (build 19042.1706, 19043.1706, and 19044.1706) for v2004, 20H2, v21H1, 21H2.

How to download the update now

To get the performance improvements brought by the new Windows 10 update, follow the steps:

Step 01: Click on the Windows flag in the lower left corner to open the Start menu.

Step 02: Select the gear symbol in the left corner under the column.

Step 03: Scroll down and select “update and security”.

Step 04: Select “check for updates”.

Step 05: Select “Download and Install” under updates.

Manually download and install update KB5013942

You can manually download KB5013942 update for Windows 10 (64-bit and 32-bit x86) here. After accessing the Microsoft Update Catalog page, follow the steps below.

Step 01: When accessing the Microsoft Update Catalog, several updates will be available. You should find the patch that supports update KB5013942 for the version of Windows 10 installed on your computer (21H2, 21H1, 20H2, and 2004).

Step 02: Select the “download” button next to the version of Windows 10 you want to download.

Step 03: Right click on the link and select “save as” to start the download.

Update Summary for Windows 10 Update KB5013942 (Build 19044.1706)

Although Microsoft’s official note on Windows 10 update KB5013942 shows that there have been improvements to address security issues, some fixes have not been mentioned. An example of this is a bug that caused the Internet Explorer browser to crash when copying and pasting text.

In addition to the issue discussed above, a critical bug has been fixed that caused a black screen when trying to connect to or disconnect from the desktop. There was also a bug fix where the “News & Interests” panel appeared on screen without any user commands.

Microsoft also fixed an issue that prevented the user from changing expired passwords during the login process. Basically, the bug prevented the person from accessing the operating system.

Windows 10 version 21H2, as well as versions 20H2 and 21H1, when updated with hotfix KB5013942, will also receive the following changes:

  • Fixed an issue that caused Kerberos authentication to fail. This happens when the client machine uses Remote Desktop Protocol (RDP) to connect to another machine.
  • Fixed an issue that prevented users from changing expired passwords during login.
  • Fixed an issue causing Windows to shut down.
  • Fixed an issue preventing users from copying the security portion of a Group Policy to a machine.
  • Fixed an issue preventing GPU load balancing in Remote Desktop.
  • Fixed issues with Microsoft RDP Client Control version 11 and higher.
  • Fixed an issue where the OneDrive file could lose focus after renaming it and pressing the Enter key.
  • Fixed an issue that caused Netdom.exe procedures to fail.
  • Fixed an issue that prevented access to a network drive after connecting to the Server Message Block version 1 (SMBv1) share.
  • Fixed an issue that could crash the server.
  • We addressed potential performance issues by reducing resource contention load in high input/output operations per second (IOPS) scenarios.

Known issues with the update

According to the update release note, some Windows 10 users will still face issues with the “Snip & Sketch” tool not working properly, preventing you from taking a screenshot using the command “Win + Shift + S” keyboard.

Another issue that occurs is some apps not opening. A server-side fix may be available within 24 hours from Microsoft.

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