Microsoft has pushed a second emergency out‑of‑band Windows update in January to undo a string of regressions introduced by its Patch Tuesday rollup — and this one should be on your radar if you use cloud‑backed storage, Outlook PST files, or manage fleets of Windows 11 PCs. The out‑of‑band...
Microsoft’s January update cycle has turned into an industry-sized headache: after the regular Patch Tuesday rollup on January 13 introduced several regressions, Microsoft pushed an initial emergency out‑of‑band (OOB) fix and then — within eleven days — shipped a second OOB cumulative to repair...
Microsoft pushed a second unscheduled, out‑of‑band Windows 11 cumulative update in late January to stop a wave of Outlook crashes and application freezes that began after the platform’s January Patch Tuesday release — a fast, corrective response that restores cloud‑file I/O behavior for many...
Microsoft pushed out another out-of-band emergency update late this month to undo a painful regression that broke file I/O for cloud-backed locations — a bug that left Outlook hung, emails duplicated or missing, and administrators scrambling for fixes.
Overview
The sequence began with...
A routine Patch Tuesday release on January 13, 2026 has left a significant portion of classic Outlook users scrambling: the Windows 11 cumulative update KB5074109 and a separate Outlook Current Channel build have each introduced regressions that render parts of the traditional Outlook experience...
azure virtual desktop
boot issues
classic outlook
encrypt only emails
gpu drivers
kb5074109
kb5074109 issues
known issue rollback
onedrive
out of band fixes
out-of-band patch
outlook classic
outlook pop hang
outlook troubleshooting
patch tuesday
pst files
pst files onedrive
remote desktop
servicing stack
stability issues
uninstall error
unmountable boot volume
windows 11
windows 11 boot issues
windows 11 update
windows 11 update issues
windows 11 updateswindowsupdates
In a rare bit of good news for people who still want their Windows desktop to act like a local desktop, OneDrive’s Folder Backup (Known Folder Move) on Windows 11 has quietly gained a better undo flow — in some builds you can now stop folder backup and have OneDrive move your files back to the...
cloud file i o
cloud file regression
cloud storage
cloud sync
context menu
emergency update
emergency updates
enterprise admin
enterprise patching
folder backup
known folder move
known issue rollback
onedrive
onedrive sync
out of band updates
outlook
outlook pst
outlook pst issues
outlook pst onedrive
outlook psts
outlook troubleshooting
remote desktop
shell extensions
system guard secure launch
windows 11
windows 11 updateswindows update
windowsupdates
A routine January Patch Tuesday rollup (KB5074109) accidentally left parts of Microsoft’s classic Outlook experience unstable for a measurable number of users, triggering freezes, lingering OUTLOOK.EXE processes, lost Sent Items and a rapid sequence of follow‑up fixes and mitigations from...
boot failure
boot failures
cloud file i o
emergency updates
january 2026
january 2026 updates
kb5074109
kb5078127
known issue rollback
onedrive
onedrive pst
out of band updates
outlook
outlook classic
outlook pop
outlook pst hangs
patch tuesday
rollback
unmountable boot volume
update regression
windows 11
windows 11 boot failures
windows 11 boot issues
windows 11 issues
windows 11 update
windows 11 updateswindowsupdates
winre recovery
Microsoft pushed a string of Windows updates over the weekend that try to clean up several regressions introduced by the January Patch Tuesday rollouts — and at the same time have started a phased, OS-driven refresh of Windows' Secure Boot certificates that will touch millions of devices ahead...
Microsoft has pushed an emergency follow-up to its January 2026 Patch Tuesday fixes after a wave of users reported Outlook crashes and other app instability when working with cloud‑synced files; the company’s out‑of‑band updates issued on January 24 (notably KB5078127 and companion packages for...
Microsoft’s second emergency update in two weeks is a blunt reminder that even mature platforms can stumble when complex subsystems collide — and for many Outlook users the fallout was immediate, painful, and productivity‑crippling. On January 24, 2026 Microsoft pushed a cumulative out‑of‑band...
Microsoft has pushed a second out-of-band Windows update in January 2026 to fix a critical bug that caused Outlook and other applications to crash or hang when they opened or saved files stored in cloud-backed locations such as OneDrive and Dropbox, compounding a rocky start to the year for...
Microsoft released an out‑of‑band cumulative update for Windows 11, version 23H2—KB5078132 (OS Build 22631.6495)—on January 24, 2026 to address a set of post‑Patch‑Tuesday regressions and to roll together prior January fixes into a single package for affected systems. The package is explicitly...
cloud file i o
cloud storage
cloud sync
cloud synchronization
emergency out of band
emergency update
emergency updates
enterprise it
kb5078127
one drive pst issues
onedrive
oob update
outlook
outlook classic hang
outlook hangs
outlook issues
outlook pst
outlook pst hangs
outlook stability
patch tuesday
patch tuesday regression
pst files
update regressions
windows 11
windows 11 23h2
windows 11 updateswindows eleven update
windowsupdates
Microsoft's unusual instruction to remove a Windows cumulative security update has placed administrators and everyday users in a difficult, high-stakes choice: accept the immediate return of core functionality or keep a patch that protects against security threats. Microsoft identified the...
Fast Startup is designed to shave seconds off cold boots by saving a partial OS state to disk, but because it deliberately preserves kernel and driver state between shutdowns it can also hide faults, block other operating systems from safely accessing Windows volumes, and interfere with certain...
dual boot
encryption
enterprise it
fast startup
it administration
patch tuesday
security cadence
update cadence
windows boot
windows security
windowsupdates
Microsoft's first cumulative Windows 11 update of 2026 — delivered as KB5074109 on January 13 — has left a broad trail of disruption: critical security fixes were installed, but several high-impact regressions followed, forcing Microsoft into rapid damage control with out‑of‑band patches and...
boot failure
boot failures
boot issues
classic outlook
cloud storage
emergency update
enterprise it
january 2026 updates
kb5074109
known issue rollback
known issues
onedrive
out of band updates
outlook
outlook classic
outlook problems
patch tuesday
pst files
recovery guidance
remote desktop
security patches
system regressions
unmountable boot volume
windows 11
windows 11 issues
windows 11 updateswindowsupdates
winre
winre recovery
Microsoft is finally taking meaningful steps to stop Windows updates from quietly devouring precious drive space on small SSDs and budget laptops — and the changes are not surface-level UI tweaks but a set of servicing and delivery improvements that reduce download sizes, shrink temporary...
Microsoft has issued emergency, out‑of‑band (OOB) Windows updates to correct two disruptive regressions introduced by the January 2026 Patch Tuesday rollout: a Remote Desktop sign‑in failure that broke credential prompts for some modern remote clients, and a shutdown/hibernate regression that...
Microsoft’s latest cumulative updates have once again tripped a familiar wire: in multiple waves across 2024–2026, Windows cumulative updates have been tied to black screens, boot loops, and other display failures that left some users unable to reach their desktops or forced to wrestle with...
Microsoft has quietly pushed emergency, out‑of‑band (OOB) Windows updates after its January Patch Tuesday rollup introduced two separate, operationally serious regressions: a Remote Desktop/Cloud PC sign‑in failure across multiple servicing branches, and a Secure Launch–linked shutdown/hibernate...
Microsofticrosoft pushed emergency out‑of‑band (OOB) cumulative updates on January 17, 2026 after its January 13 Patch Tuesday rollup introduced two separate but high‑impact regressions: a Remote Desktop authentication failure that blocked access to Microsoft 365 Cloud PCs, Azure Virtual Desktop...