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Windows 11 Cloud Rebuild: How It Works

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A Windows 11 PC that refuses to start may no longer need a USB installer to get back up and running. Microsoft has introduced Cloud rebuild, a recovery feature that downloads a fresh Windows image and device drivers from Windows Update, even when the existing operating system cannot boot.

Microsoft introduced Cloud rebuild in its Oct. 28 optional preview update, KB5127936, for Windows 11 versions 25H2 and 26H2. The gradual rollout gives users and IT administrators another way to recover PCs that won’t start. However, Cloud rebuild erases local files, applications, accounts, and settings, so users should check their backups and explore less disruptive recovery options before proceeding.

Cloud rebuild reinstalls Windows 11 without a USB drive

When a Windows 11 PCfails to start, reinstalling the operating system may require a bootable USB drive or recovery files stored on the device. Cloud rebuild provides another option by downloading a...

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