Microsoft issues second emergency patch for Windows this month - update your PC today

Follow ZDNET: Add us as a preferred source on Google.

ZDNET's key takeaways

• Microsoft has issued its second emergency patch of the month.
• The new patch fixes a bug that affects cloud-based services.
• But another bug is preventing some Windows PCs from booting up.

This year has got off to a rough start for Microsoft and Windows users, at least when it comes to bugs. The January 2026 update introduced a slew of glitches that the company is now trying to clean up. At the same time, new bugs keep popping up and plaguing users.

New emergency patch

On Saturday, Microsoft kicked off its second out-of-band emergency patch of the month. Dubbed KB5078127, this one fixes a problem introduced by the January Patch Tuesday update. Specifically, the update prevented Outlook and other apps from opening files from, or saving files to, cloud-based storage sites such ...