Microsoft has rolled out a second out-of-band update for Windows 11 to resolve crashes in Outlook and issues with cloud-stored files. The patch targets bugs introduced by the company's January 2026 security update. This follows a previous emergency fix last week addressing shutdown and login problems.
Microsoft's latest software intervention comes amid ongoing challenges from its January 2026 security update for Windows. The new out-of-band patch specifically tackles a glitch affecting Outlook, where the email application crashes or fails to launch for some users on Windows 11, particularly when personal storage table (PST) files are kept in cloud services such as OneDrive.
The update also resolves broader problems with applications that open or save files in cloud-backed locations. Affected users reported apps becoming unresponsive or displaying error messages during these operations. This marks the second emergency response this year to complications from the January patch; last week, Microsoft addressed separate issues, including Windows 11 devices that refused to shut down or enter hibernation mode, and login failures via remote connections on both Windows 10 and 11 systems.
Out-of-band updates like this one are reserved by Microsoft for urgent matters that demand immediate attention outside the standard monthly cycle. Importantly, the current release is cumulative, meaning users need only install this version to correct the lingering effects of the January security measures. No specific timeline for affected users was detailed, but the problems emerged shortly after the initial security rollout in early 2026.
While Microsoft has not commented further on the root causes, the repeated fixes highlight the complexities of integrating security enhancements with cloud-dependent features in modern operating systems.