Another out-of-band fix rolls out
Microsoft has issued a second emergency out-of-band update for Windows 11 to address serious bugs introduced by January 2026’s Patch Tuesday updates. The new update, KB5078127, is now rolling out globally.
The latest fix targets a problem that left several popular apps unusable after installing recent security updates.
Outlook and cloud apps were breaking
According to Microsoft, the bug caused applications that rely on cloud storage to become unresponsive or fail outright. Affected apps included Outlook, OneDrive, and Dropbox.
In some cases, Outlook would hang on launch, refuse to reopen, or re-download old emails. Until now, Microsoft’s only workaround was uninstalling the January security updates — something few users want to do.
KB5078127 replaces that workaround and bundles fixes from both the January 13 Patch Tuesday release and the first emergency update issued on January 17.
A messy Patch Tuesday cycle
This is the second emergency update Microsoft has released in a single week. The first out-of-band patch fixed issues that prevented some systems from shutting down or using Remote Desktop — but it also introduced the app-breaking bug now being addressed.
The repeated emergency fixes highlight ongoing quality problems with Windows updates, especially for Windows 11 users running recent versions.
What users should do
If you were affected by frozen cloud apps or Outlook issues after January’s updates, installing KB5078127 should resolve the problem without rolling back security patches. Microsoft says the same fix is also being applied to other supported Windows versions.
For now, all eyes are on February’s Patch Tuesday, as Microsoft looks to restore confidence after a particularly rocky update cycle.
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