Microsoft Spent Tuesday Fixing What August Broke

Open Settings, then Windows Update. Find "Get the latest updates as soon as they're available" and turn it off on work computers.

On August 27 Microsoft shipped an optional preview update for Windows 11. On some machines it turned the desktop background solid black and reset people's mouse settings — and in Microsoft's own words, "attempting to manually restore customized settings does not work." It was fixed twelve days later, in the same September 8 release that carried the record pile of security patches. Nobody lost data. Nobody got breached. If this landed on you, the cost was a black wallpaper you couldn't change for a week and a half. We're writing about it anyway, because the mechanism matters a great deal more than this particular bug does. Worth saying plainly: we hold preview updates back from the machines we manage. So this is our own practice, not neutral advice. Two things called "updates" Windows ships two different things under one word. The second Tuesday of the month is the security release. That is the one that closes the flaws criminals use. Take it. Take it promptly. Then, in the last week of the month, there's an optional preview — next month's fixes shipped early so that problems surface before they reach everybody. That is a sensible thing for Microsoft to do. It is a strange thing for a business to volunteer for. A preview update is a release candidate, and running one means your office is part of the test. The August 27 update was one of those. The technical part — you can skip this box KB5120998, released August 27, 2026, OS builds 26100.9278 and 26200.9278 — a preview cumulative update for Windows 11 versions 24H2 and 25H2. Microsoft's Windows release health page records two known issues arising from it: "some Windows Desktop settings fail to load, resulting in desktop backgrounds displaying as a solid black color," and mouse personalization settings, including cursor and cursor animations, reverting to standard settings. Both were resolved by KB5124008, released September 8, 2026. Microsoft's guidance: "We recommend you install the latest security update for your device as it contains important improvements and issue resolutions, including this one." Microsoft describes the August update as shipping in two phases, gradual rollout and normal rollout. What that actually means "Gradual rollout" means an update doesn't go to everybody at once — it goes out in waves. Where you sit in those waves depends partly on a setting on your own machine. That setting is called "Get the latest updates as soon as they're available." It sits on the Windows Update screen and it is one tap. All it does is move you toward the front of the queue for things that haven't finished being tested. And "resolved by KB5124008" means the fix arrived in the ordinary September security update. You didn't have to do anything clever. You had to be patched. What to do, and it takes about two minutes Open Settings, then Windows Update. Find "Get the latest updates as soon as they're available" and turn it off on work computers. That's it. You will still get every security update on the second Tuesday of the month, the same day as everyone else. What you stop getting is the preview. This month what was at stake was a wallpaper. The reason to bother is that it won't always be a wallpaper — and the businesses that get hurt by an update generally aren't the ones that skipped it. They're the ones that took it early without ever deciding to.