1) September 30, 2021—
KB5005611 (OS Builds 19041.1266, 19042.1266, and 19043.1266) Preview
Highlights: - Updates an issue that causes the system clock to be wrong by one hour after a daylight saving time (DST) change.
- Updates an issue that causes applications, such as Microsoft Outlook, to suddenly stop working during normal use.
- Updates an issue with the Microsoft Outlook Add-in that prevents you from typing a reply.
- Updates an issue that causes blurry News and interests icons when you use certain screen resolutions.
- Updates an issue that causes News and interests to appear when you right-click the taskbar even if you have turned off that feature on your device.
- Updates an issue that might cause distortion in the sound that Cortana and other voice assistants record.
- Updates an issue that causes your device to stop working after you restart it.
- Updates an issue that prevents you from providing input to apps when the taskbar is not at the bottom of the screen.
September 30, 2021—KB5005611 (OS Builds 19041.1266, 19042.1266, and 19043.1266) Preview (microsoft.com) 2) September 30, 2021-
KB5005539 Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10, version 2004, Windows Server, version 2004, Windows 10, version 20H2, Windows Server, version 20H2, and Windows Version 21H1
Quality and reliability improvements: CLR1
- The existing memory pressure algorithm used in the GC.AddMemoryPressure API is triggering induced GC too aggressively. This update provides an alternative algorithm that is less aggressive. An application can opt into the new algorithm, by setting:
COMPlus_GCNewMemoryPressure environment variable to 1
This is applicable for any application that use the GC.AddMemoryPressure API.
September 30, 2021-KB5005539 Cumulative Update Preview for .NET Framework 3.5 and 4.8 for Windows 10, version 2004, Windows Server, version 2004, Windows 10, version 20H2, Windows Server, version 20H2, and Windows Version 21H1 (microsoft.com) *No problems so far.