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Apps might become unresponsive when saving files to cloud-backed storage

Microsoft lists this known issue for 8 Windows versions; its status is Resolved. It started with KB5073379, KB5073455, KB5073457 and 3 more updates. Microsoft resolved it in KB5078127, KB5078129, KB5078131 and 3 more updates.

Resolved1 version

Facts

Microsoft id
2738
Status
Resolved
Products
Windows 10 Enterprise LTSC 2019, Windows 10 Enterprise LTSC 2021, Windows 10, version 1809, Windows 10, version 22H2, Windows 11, version 23H2, Windows 11, version 24H2, Windows 11, version 25H2, Windows Server 2019, Windows Server 2022, Windows Server 2025, Windows Server, version 23H2
Versions
Windows 10 Enterprise LTSC 2021, Windows 10, version 1809 and Windows Server 2019, Windows 10, version 22H2, Windows 11, version 23H2, Windows 11, version 24H2, Windows 11, version 25H2, Windows Server 2022, Windows Server 2025
Originating KBs
KB5073379, KB5073455, KB5073457, KB5073723, KB5073724, KB5074109
Resolved by
KB5078127, KB5078129, KB5078131, KB5078132, KB5078135, KB5078136
First captured by us
(from our first import of this list)
Microsoft last modified
Source
Windows known issues · open the original at Microsoft

Status per Windows version

VersionStatusOriginating updateOpenedResolved
Windows 11, version 25H2Resolved KB5078127OS Build 26200.7623, KB5074109, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows 11, version 24H2Resolved KB5078127OS Build 26100.7623, KB5074109, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows 11, version 23H2Resolved KB5078132OS Build 22621.6491, KB5073455, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows Server 2025Resolved KB5078135OS Build 26100.32230, KB5073379, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows Server 2022Resolved KB5078136OS Build 20348.4648, KB5073457, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows 10, version 22H2Resolved KB5078129OS Build 19045.6809, KB5073724, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows 10 Enterprise LTSC 2021Resolved KB5078129OS Build 19044.6809, KB5073724, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC
Windows 10, version 1809 and Windows Server 2019Resolved KB5078131OS Build 17763.8276, KB5073723, 2026-01-132026-01-21 06:10 UTC2026-01-23 22:00 UTC

Microsoft says

After installing Windows updates released on or after January 13, 2026 (KB5074109), some applications might become unresponsive or experience unexpected errors when opening files from…

Windows known issues,

Read Microsoft's full post

What Microsoft changed

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

  1. First version we captured ·

    As first seen: Resolved
    Status
    Resolved

    Seen by us · Microsoft's timestamp · Microsoft's page

Mentioning the same Microsoft ids

Last updated