Microsoft is pushing out KB5085516 via Windows Update. It's a cumulative update including a fix for PCs/laptops that cannot sign into Microsoft services e.g., OneDrive.

bleepingcomputer[.]com/news/microsoft/microsoft-march-2026-patch-tuesday-fixes-2-zero-days-79-flaws/

bleepingcomputer[.]com/news/microsoft/windows-11-kb5079473-and-kb5078883-cumulative-updates-released/

bleepingcomputer[.]com/news/microsoft/microsoft-releases-windows-10-kb5078885-extended-security-update/

I haven't had any problems this time round, other than a power outage while updating one of my tablets, which is obviously not Microsoft's fault. Neowin had a writeup of initial complaints they found on Reddit & the Feedback Hub, while Microsoft today acknowledged a problem that apparently has to do with PCs/laptops that aren't connected to the internet when they're fired up. Those systems won't connect to Microsoft services like OneDrive. Microsoft's workaround, while they work on a fix, is don't do that -- make sure you're connected & then reboot.

neowin[.]net/news/report-windows-11-kb5079473-fails-to-install-reboot-loops-freezes-system-breaks-graphics/

bleepingcomputer[.]com/news/microsoft/kb5079473-march-windows-11-update-breaks-microsoft-account-sign-ins/

Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.

This Patch Tuesday also addresses three "Critical" vulnerabilities, 2 of which are remote code execution flaws and the other is an information disclosure flaw.

The number of bugs in each vulnerability category is listed below:

46 Elevation of Privilege Vulnerabilities
2 Security Feature Bypass Vulnerabilities
18 Remote Code Execution Vulnerabilities
10 Information Disclosure Vulnerabilities
4 Denial of Service Vulnerabilities
4 Spoofing Vulnerabilities