Some machines are failing to start after security updates, prompting yet another Microsoft investigation Microsoft is investigating reports that its January 2026 security updates are leaving some ...

Round and round we go.

A fresh wave of Windows 11 update trouble is making the rounds, and this one is about as disruptive as it gets: some PCs reportedly can’t boot after installing the latest January 2026 security update.

Microsoft is actively investigating the boot failure reports and working on potential fixes or additional workarounds. If you have downloaded the latest security updates from the January 2026 patch, ...