Microsoft Begins Testing Cloud Rebuild, a Remote Reinstall Tool for Broken Windows 11 PCs

Key points

• Microsoft started testing Cloud Rebuild in Windows 11 Insider Experimental Preview Build 26300.8772, announced on Monday by Windows Insider Communications Lead Stephen Lines.
• Cloud Rebuild reinstalls Windows 11 from the cloud even when the machine will not start, without needing a USB stick or a custom image.
• Microsoft first previewed the feature at its Ignite developer conference in November 2025.
• A companion tool, Point-in-Time Restore, began rolling out in June with the KB5095093 preview cumulative update for Windows 11 24H2 and 25H2.
• Both tools sit inside Microsoft's Windows Resiliency Initiative, aimed at getting broken PCs working again quickly.

Microsoft is testing a new way to fix a Windows 11 PC that has stopped working. It is called Cloud Rebuild. The company switched it on this week for people enrolled in the Windows Insider Experimental channel, the earliest testing track for unfinished features.

Here is the plain version of what it does. If your computer refuses to start, or keeps crashing, Cloud Rebuild reaches out to Microsoft's servers, downloads a fresh copy of Windows 11 along with the drivers your specific machine needs, and reinstalls the whole operating system. You do not need a USB stick. You do not need a technician with a recovery disc. The existing, broken Windows on the drive does not need to be working.

"We're introducing Cloud rebuild, a new recovery option that restores a Windows 11 PC to a clean, known-good state by performing a full OS reinstall, even when Windows won't boot," Stephen Lines, Microsoft's Windows Insider Communications Lead, said in the announcement.

That is the key difference from the older "Reset this PC" option, which relied on files already sitting on the damaged machine. Cloud Rebuild pulls everything down fresh.

How does someone actually use it?

Testers have to install Windows 11 Insider Experimental Preview Build 26300.8772 first. Then, when the PC boots into the Windows Recovery Environment (the blue troubleshooting screen you see when Windows can't start normally), they go to Troubleshoot, then Recovery, then pick Cloud rebuild. The tool shows the Windows version, edition and language it is about to install, warns that data on the drive will be wiped, and waits for confirmation before starting.

The feature was first shown off at Microsoft's Ignite developer conference in November 2025, and was reported this week by BleepingComputer after Microsoft opened it up to Insiders.

Why is Microsoft building this now?

The short answer: the CrowdStrike outage of July 2024, which grounded flights and knocked hospital systems offline, showed how painful it is to fix millions of Windows machines by hand when they refuse to boot. Microsoft has since bundled a set of recovery tools under a programme it calls the Windows Resiliency Initiative.

Cloud Rebuild is one piece. There are others.

Point-in-Time Restore, or PITR, lets an administrator roll a Windows 11 PC back to an earlier working snapshot in minutes. It started rolling out in June with the KB5095093 preview cumulative update for Windows 11 versions 24H2 and 25H2.

Quick Machine Recovery, updated in November, kicks in automatically when a bad driver or setting stops the PC from starting. It boots into the recovery environment, sends crash information to Microsoft, and lets Microsoft strip out the problem driver from a distance.

Microsoft is also testing a prompt that suggests running a memory scan after a Blue Screen of Death, the full-screen crash message familiar to most Windows users.

What should ordinary users do?

Nothing, for now. Cloud Rebuild is only in the Experimental channel, the least stable Insider track. Regular home and business users will not see it in a settings menu yet. Microsoft has not committed to a general release date. If you are testing Insider builds, be aware that Cloud Rebuild wipes the drive, so back up anything you care about before pressing the button.