Windows 11 Cloud Rebuild: how to use it, and when you shouldn’t

Windows 11 Cloud Rebuild is a recovery tool that performs a full reinstall of Windows using files pulled from the internet rather than from your damaged hard drive or a USB stick. Microsoft first showed it at its Ignite conference in November 2025, tested it with Windows Insiders, and has now shipped it to regular users.

It runs from the Windows Recovery Environment, or WinRE, a small separate system that lives alongside Windows on your drive. Because WinRE is separate, Cloud Rebuild can start even when your main Windows installation is too broken to show the sign-in screen.

How it differs from Reset this PC and Cloud download

Windows 11 already had a reset option called Cloud download, so it is fair to ask what is new. Cloud download still leans on the existing installation working well enough to run the reset. Cloud Rebuild does not. It also fetches your device drivers from Windows Update, so the PC should come back with Wi-Fi, graphics and sound working rather than with missing drivers you have to hunt down.

Cloud Rebuild arrived in KB5127936, the optional preview update Microsoft released in late October for Windows 11 versions 25H2 and 26H2. Optional means Windows will not install it on its own yet. Microsoft is also turning the feature on gradually, so having the update doesn’t guarantee you’ll see the option today.

1. Open Settings and go to Windows Update.
2. Turn on the toggle labeled Get the latest updates as soon as they’re available. This puts you nearer the front of the queue, though it isn’t a promise.
3. Check for updates and install the optional KB5127936 update if it is offered, then restart.
4. Go to Settings > System > Recovery and look for Rebuild PC. If it is there, the feature is ready.

Do this while your PC is healthy. The whole point is to have the option waiting before something goes wrong.

Before anything else, plug the PC into power and make sure you have a wired connection or a Wi-Fi password handy. The rebuild downloads Windows and drivers, and an interrupted rebuild can leave the computer unable to start.

If Windows still starts

1. Open Settings > System > Recovery.
2. Select Rebuild PC. The computer restarts into the recovery environment and opens Cloud Rebuild.
3. Follow the steps in the next section from the network screen onward.

If Windows won’t start

1. Power the PC on. After a few failed starts in a row, Windows should open the blue recovery environment by itself.
2. Select Troubleshoot. On most PCs, Cloud rebuild sits under Recovery and uninstall; on some it appears directly on the Troubleshoot screen. If you can’t find it, the feature hasn’t reached your device yet.
3. Connect to the internet: plug in an Ethernet cable or pick your Wi-Fi network when asked.
4. Pick how to deal with your data. Remove files is the right choice if you will keep using the PC. Remove & sanitize is for a computer you are selling, recycling or handing back to work. It takes longer and makes old data much harder to recover.
5. Check the Windows version, edition and language shown on screen, accept the data-loss warning and confirm. Windows then downloads, installs and may restart several times. Don’t switch it off.

When it finishes, you set Windows up like a new PC: sign in, restore your files from backup and reinstall your apps.

One habit makes all of this painless: back up before you need to. Syncing your Documents, Desktop and Pictures folders to a cloud service, or copying them to an external drive once a week, turns Cloud Rebuild from a scary last resort into a quick reset you can run without losing anything that matters.

Microsoft’s own support page is blunt that Cloud Rebuild removes everything on the PC, including files stored on the computer, user accounts, apps and settings. Anything you synced to OneDrive or another cloud service is safe. Anything that lived only on that drive is gone.

The sanitize option is even more final. It uses the drive’s built-in erase function and can’t be undone. Microsoft also warns that Windows can’t confirm the hardware erased the data properly, so businesses with strict disposal rules should check with the drive maker before relying on it.

Try these gentler fixes first

Cloud Rebuild is meant for problems nothing else can solve. Before you wipe the machine, work through the lighter options, roughly in this order:

• Point-in-Time Restore, where available, which rolls Windows back to a recent healthy snapshot within minutes.
• Uninstall the latest update, also under Recovery and uninstall, if trouble started right after an update.
• Reset this PC with Keep my files, which reinstalls Windows but keeps your personal files. It removes apps and settings.

If your files matter and none of that works, consider copying them off first. You can remove the drive and read it from another computer, or ask a repair shop or your IT department for help before choosing Cloud Rebuild.

For anyone who is the family IT department, this is a real time saver. You no longer need to keep a recovery USB stick in a drawer, or build one on a second computer while someone waits. A PC that boots to the recovery screen can now fix itself with only an internet connection.

Office IT teams get remote control too. Administrators can set up and start a Cloud Rebuild from afar using Microsoft’s Recovery management tools, choosing either the build already on the device or a specific target version. That fits Microsoft’s wider push to make Windows PCs recover faster after bad updates, alongside tools like Quick Machine Recovery and Point-in-Time Restore.