Microsoft rushes out cloud storage fix after January update

"Microsoft dropped a weekend treat for administrators with yet another out-of-band update to deal with Outlook freezes and broken cloud storage. The latest fix is for an issue introduced in the January 2026 Windows Security Update in which some applications that open or save files stored in cloud-backed locations could become unresponsive or display errors. Microsoft gave its email client as an example."

"The problem is compounded by the fact that, as a Security Update, uninstalling it while Microsoft addresses the bugs risks exposing systems to the vulnerabilities the patch was meant to fix. This is the second out-of-band update Microsoft released since the January 2026 Security Update. An earlier emission on January 17 dealt with borked credentials for remote desktop connections and hibernation problems."

Microsoft released an out-of-band Windows update to fix application unresponsiveness caused by the January 2026 Security Update when opening or saving files in cloud-backed locations. The bug affected multiple applications, with Outlook cited as an example where PST files stored in OneDrive could make the client unresponsive or fail to open. The issue was initially thought to be limited to classic Outlook POP profiles but was later linked to cloud-backed storage. Uninstalling the Security Update risks reintroducing security vulnerabilities. Any supported Windows version, including Server, might be affected, and administrators should install the fix.

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