bleepingcomputer[.]com/news/microsoft/microsoft-january-2026-patch-tuesday-fixes-3-zero-days-114-flaws/
bleepingcomputer[.]com/news/microsoft/windows-11-kb5074109-and-kb5073455-cumulative-updates-released/
bleepingcomputer[.]com/news/microsoft/microsoft-releases-windows-10-kb5073724-extended-security-update/
While Microsoft is starting their slow rollout to implement or activate the newer secure boot certificate, from what I can tell the groundwork was already laid by October last year, so chances are [IMHO] nothing out of the ordinary to cause problems. And I haven't experienced or read of any, though there were a couple of bugs mainly targeting corporate IT, which Microsoft quickly issued fixes for [because it was corp. IT].
bleepingcomputer[.]com/news/microsoft/microsoft-releases-oob-windows-updates-to-fix-shutdown-cloud-pc-bugs/
"... January 2026 Patch Tuesday with security updates for 114 flaws, including one actively exploited and two publicly disclosed zero-day vulnerabilities.This Patch Tuesday also addresses eight "Critical" vulnerabilities, 6 of which are remote code execution flaws and 2 are elevation-of-privilege flaws.
The number of bugs in each vulnerability category is listed below:
57 Elevation of Privilege vulnerabilities
3 Security Feature Bypass vulnerabilities
22 Remote Code Execution vulnerabilities
22 Information Disclosure vulnerabilities
2 Denial of Service vulnerabilities
5 Spoofing vulnerabilities