Windows 11 KB5124010 is an optional preview update that adds Copilot key remapping, Camera Roll backup to OneDrive and Emoji 17. It also fixes several annoying Bluetooth bugs. Windows won’t push it on you, so you get to pick when to install it.
Here’s a quick look at what it brings.
- Type: optional, non-security preview update (quality changes only)
- Builds: 26100.9550 (24H2), 26200.9550 (25H2) and 26300.9550 (26H2), according to ElevenForum
- Final version: the same changes reach everyone on Patch Tuesday, October 13
- Removed: PC-to-PC Migration
If you just want the short version: it’s a useful but non-urgent update. Most of the value is in the Bluetooth fixes.
What Windows 11 KB5124010 actually changes
Most changes are small quality-of-life tweaks. Together they make daily use a little smoother. BleepingComputer counted 46 changes and fixes in total.
| Change | What it does |
|---|---|
| Copilot key remapping | Lets the Copilot key act as Right Ctrl or the Context Menu key |
| Open apps maximized | New accessibility setting that opens app windows maximized |
| Camera Roll backup | Backs up phone photos to OneDrive; you set it up with a QR code |
| Touchpad gestures | More gesture controls for precision touchpads, under Settings > Bluetooth & devices > Touchpad |
| Slideshow wallpaper | Keeps running across multiple desktops instead of reverting to Picture |
| Emoji 17.0 | Adds the new Unicode emoji set |
| Recovery plug-in | Extends remote management of the Windows Recovery Environment (WinRE) |
The Copilot key change is the one many people will use first. If you never touch that key, you can now give it a job you actually need.
According to IT-Connect, File Explorer can also preview downloaded files again, after a security warning. Treat that one as a report until you see it on your own PC, since it isn’t in every changelog summary.
The Bluetooth fixes are the real reason to care
Bluetooth gets the most attention in this release. If your headphones or mic have been acting up, this is the part to read.
- The Bluetooth radio could be off while the Settings toggle still said it was on
- Crashes with error code 0x139 while streaming Bluetooth audio
- Microphone problems with some Bluetooth Classic audio accessories
- Reliability and performance issues with LE Audio accessories
Why this matters: a toggle that lies about the radio state is hard to troubleshoot. A 0x139 crash during music or calls is worse, because it takes the whole PC down.
There is also a fix for File History backups that failed after the September 2026 security updates. If you rely on File History, that alone may be worth the install.
The microphone fix matters most if you take many calls on wireless headsets, since some Bluetooth Classic accessories had trouble working with the mic.
PC-to-PC Migration is gone: what to use instead
Microsoft removed PC-to-PC Migration in this update. The company now points people to Windows Backup with OneDrive for moving files and settings to a new PC.
If you were planning a PC switch soon, set up Windows Backup first. It’s one less surprise on moving day.
How to install it, and who should wait
You can get the update in two ways. The easy way is through Windows Update.
- Open Settings > Windows Update, click Check for updates, then choose Download and install
- Or search for KB5124010 in the Microsoft Update Catalog and install it by hand
If “Get the latest updates as soon as they’re available” is on, it may install on its own. Create a restore point first if the PC matters for work.
Still on 24H2? This is its last preview update, and support ends on October 13. Read our guide to Windows 11 24H2 end of support to stay protected. Curious about the newest version? See what’s in Windows 11 26H2.
Any known problems? The coverage we found lists none for this preview. Still, preview builds can behave differently on older drivers, so check that your PC boots and your Bluetooth gear connects right after installing.
ElevenForum dates the release to September 22, while BleepingComputer published its report a couple of days later. Microsoft’s own release notes are the final word on the exact date.
Frequently Asked Questions
Is Windows 11 KB5124010 safe to install?
It is an optional preview, so it has had less real-world testing than a Patch Tuesday update. Back up first, or wait for the same changes on October 13.
Does KB5124010 include security fixes?
No. It is a non-security preview with quality improvements only. The security fixes come with the October Patch Tuesday release.
How do I remap the Copilot key?
Microsoft says the update lets the Copilot key act as Right Ctrl or the Context Menu key. Check Settings after installing; the exact menu location may vary.
Can I uninstall KB5124010?
Yes, you can remove it from the update history in Settings. Make a restore point first so you have a fallback if something goes wrong.
Should you install it now?
If Bluetooth audio or File History has caused you trouble, install it now and enjoy the fixes. If your PC works fine, wait until October 13 and let Patch Tuesday deliver the same changes with security patches included. Either way, back up before you update.
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