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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Microsoft no longer offers a standalone download of Windows 10 KB5003173 through the Microsoft Update Catalog or other release channels. Its release page says that, as of September 12, 2023, the update is available only through Windows Update. The page recommends installing the latest security quality update instead. KB5003173 was released on May 11, 2021; build 19042.985 is its Windows 10 version 20H2 build.
Is there a direct download for KB5003173?
No current standalone download link is listed by Microsoft. Its KB5003173 release page says that since September 12, 2023, the update is available only through Windows Update. Microsoft lists the Microsoft Update Catalog, Windows Update for Business, and WSUS as unavailable channels for this KB.
Microsoft says Windows Update and Microsoft Update download and install the update automatically when it is offered to a device. That notice does not establish that every device can still receive this historical update, regardless of its servicing state. The page recommends updating to the latest security quality update.
Which Windows 10 version uses build 19042.985?
KB5003173 was released on May 11, 2021. Microsoft lists different build numbers for the Windows 10 versions covered by the release:
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| Windows 10 version | Build for KB5003173 |
|---|---|
| Version 2004 | 19041.985 |
| Version 20H2 | 19042.985 |
| Version 21H1 | 19043.985 |
These are release-build identifiers, not download options. If you are checking whether the title’s build applies to your system, confirm your Windows version rather than assuming every system receiving KB5003173 uses build 19042.985.
What did KB5003173 include?
Microsoft describes KB5003173 as a security and quality update. Its highlights address basic Windows operations, security for OLE compound documents, and Bluetooth driver security. The release page also names security updates for Windows App Platform and Frameworks, the Windows Kernel, Windows Media, the Microsoft Scripting Engine, and the Windows Silicon Platform.
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The update package also includes servicing-stack improvements. Microsoft explains that the servicing stack is the component that installs Windows updates and that the servicing-stack update (SSU) and latest cumulative update (LCU) are combined.
What to do if installation reports error 0x800f0823
If installation fails with error 0x800f0823 (CBS_E_NEW_SERVICING_STACK_REQUIRED), Microsoft directs users to install standalone servicing-stack update KB4598481 before installing this LCU. Follow Microsoft’s instructions for the device and update state rather than looking for a Catalog download of KB5003173, which Microsoft says is no longer available there.
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Which issues did Microsoft document?
Microsoft’s release page records several historical issues and, for most, identifies a later update that resolved them:
- Japanese IME Furigana: Some apps using ImmGetCompositionString() might not display the correct Furigana characters. Microsoft says this was resolved in KB5005101.
- Game performance: A small subset of users reported lower-than-expected performance, mainly in full-screen or borderless games with two or more monitors. Microsoft says KB5003690 resolved this issue.
- Dolby Digital audio: Certain configurations could produce high-pitched noise or a squeak with 5.1 Dolby Digital audio. Microsoft says KB5003690 resolved it.
- Taskbar text: The news and interests taskbar button could show blurry text on some display configurations. Microsoft says KB5003690 resolved it.
- Custom offline images and Edge Legacy: Some custom offline media or ISO images created by slipstreaming the update without first including a sufficiently recent SSU could lose Edge Legacy without automatically replacing it with the new Microsoft Edge. Microsoft’s stated workaround is to include the SSU first. For an affected image already in use, the page describes installing the new Edge as mitigation.
These are issues documented for this historical release; Microsoft’s page identifies the named later updates as resolutions for the first four items.
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Can you uninstall KB5003173?
Microsoft says to remove the LCU with DISM’s /Remove-Package option and the LCU package name. To find package names, its instructions use DISM /online /get-packages. Microsoft specifically warns that WUSA’s /uninstall switch does not work for the combined SSU/LCU package. The SSU cannot be removed from the system after installation. Consult Microsoft’s removal instructions before changing installed packages.
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