Microsoft has posted an online bulletin confirming that the company is investigating reports that state Windows 11's latest security update has rendered some PCs unbootable.

Microsoft has linked recent reports of Windows 11 boot failures after installing the January 2026 updates to previously failed attempts to install the December 2025 security update, which left systems ...

Microsoft's Windows 11 January 2026 Update woes continue, and now the company is confirming that some users are no longer able to boot their PCs, receiving the BSOD stop code "UNMOUNTABLE_BOOT_VOLUME" ...

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 ...