Windows 11’s Patch Tuesday nightmare gets worse — Microsoft says some PCs might not boot
Summary
Microsoft confirms that the January 2026 Windows security update has left some PCs unable to boot, prompting an investigation. This issue adds to a string of Patch Tuesday problems, including previous shutdown, sign-in, and Outlook bugs that required emergency updates. Microsoft advises manual recovery via Windows Recovery Environment to uninstall the latest patch, with potential impact on certain Windows 11 versions.