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The good news is that the fix is already included in the optional KB5089573 update released in May.
Microsoft says the issue was caused by not having enough free space in the EFI System Partition. Apparently, devices with very little space there were the most affected.
I had this problem. The update would install, restart my PC, then fail and roll back with a message saying, “Something didn’t go as planned.”
Looks like Microsoft has finally fixed the Windows 11 KB5089549 update issue that was causing installation failures for some users.
I’ve been following the Windows K2 project rumors for a while, and this seems like the first visible result. If Microsoft continues improving performance through 2027 like they’re planning, Windows 11 could finally shed its reputation for feeling sluggish. For once, this looks like an update that’s actually focused on making PCs faster instead of just adding new features.
I’m cautiously optimistic. Microsoft has talked about performance improvements before, but Windows 11 still feels heavier than Windows 10 on some systems. I’ll wait until the June rollout and see what real users are saying.
If this works as advertised, it could be great for older hardware. My budget laptop runs Windows 11 fine, but opening File Explorer or Search always has a slight delay. Reports claiming up to 40% faster app launches sound promising.
What’s interesting is that Microsoft isn’t really inventing something new here. macOS and Linux have used similar “race-to-sleep” techniques for years. The CPU ramps up briefly, completes the task faster, then returns to a low-power state. It’s a smart way to improve responsiveness without constantly increasing power consumption.
I installed it on my test machine yesterday. The difference isn’t massive, but Windows definitely feels snappier. The Start menu opens instantly, and apps like Edge and Outlook seem to launch faster than before.
Just came across news about Windows 11’s optional update KB5089573. Apparently it includes a new “Low Latency Profile” feature that speeds up app launches, the Start menu, Search, and other parts of the UI by briefly boosting CPU performance. Has anyone installed it yet?
Quick update: I tested a couple of the full-size CR2 files with a repair tool and managed to recover previews from some of them. A few are still completely dead, but at least several important photos seem salvageable. Looks like the smaller files are probably gone, but the full-size ones may still have a chance. Thanks everyone for the suggestions!
Agreed. Also, if the files came from the same camera and were shot around the same time, some photo repair software can use healthy CR2 files as references when rebuilding damaged ones. I’ve recovered a few important shots that way.
One thing worth checking: can you see thumbnails or previews anywhere? Sometimes the embedded JPEG preview survives even when the RAW file itself is damaged. If that’s the case, you may still be able to extract something useful.
Good point. Just made a backup folder so I don’t accidentally mess with the originals.
That’s great to hear. I was holding off on installing updates because I kept seeing reports about the error.