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Windows 10 1607 Windows 10 1607 Out-of-band update
Out-of-band

KB5091572

KB5091572: Cumulative update for Windows 10, version 1607, April 2026. Remote Desktop security warnings display correctly again

In short

The update adds a resolution for incorrectly displayed Remote Desktop security warnings. It is available only from the Update Catalog and requires the latest servicing stack update.

Does it affect you? Applies to: The page lists Windows 10 Enterprise LTSB 2016 under “Applies to,” but also says this out-of-band update applies to Windows Server 2016 only. The page also lists Windows 10 IoT Enterprise 2016 LTSB in its end-of-support information.

Build
14393.9062
Restart
Required
Review notes Additional details from the official release notes (5) Read notes
  • This page The page's May 12 change log says a resolution was added to the Remote Desktop warning issue, but it does not identify KB5091572 as the update that fixes it.
  • In short The page's May 12 change log says a resolution was added to the Remote Desktop warning issue, but it does not identify KB5091572 as the update that fixes it.
  • In short Microsoft recommends installing SSU KB5082089 first. Without the latest SSU, KB5091572 might not install.
  • What to do Microsoft recommends installing SSU KB5082089 first. Without the latest SSU, KB5091572 might not install.
  • What to do WSUS administrators must approve both SSU KB5082089 and update KB5091572.

The official sources are linked at the end of the page.

Microsoft publishes separate notes for this KB for Windows Server.

What changes

Fix 1 change

Remote Desktop

For: Remote Desktop users

  • The KB page adds a resolution for Remote Desktop security warnings that might not display correctly.1

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-04-19
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5082198, KB5078938, KB5075999, KB5073722
+17 earlier KB5074974, KB5071543, KB5068864, KB5066836, KB5065427, KB5063871, KB5062560, KB5061010, KB5058383, KB5058921, KB5055521, KB5053594, KB5052006, KB5049993, KB5048671, KB5046612, KB5037423
Replaced by
KB5087537
VersionBuildChannel
1607 14393.9062 General availability

Security

No vulnerabilities are listed for this update.

Updated components

27 files changed since the previous update for the same versions.

Sources

Updated
Cited passages from Microsoft's official notes (1)
  1. 1. Added the resolution to the known issue "Remote Desktop security warnings might not display correctly" support.microsoft.com
Checked automatically: 8 of 8 checks passed, 1 quoted passage · compared with Microsoft's page on Sep 25, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 3/5, clarity 4/5, completeness 4/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake