Windows Recovery Environment explained

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From Windows Recovery Environment explained - Microsoft Tech Community:
 

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The Windows Recovery Environment (WinRE) is a companion operating system installed alongside Windows 10, typically in a separate partition, that can help with troubleshooting, recovery, or booting from external media, such as a USB stick. WinRE is also used during the Windows update process to apply updates in specific paths or phases. (This process is sometimes referred to as SafeOS.)

In this post, we're going to walk you through the tools in WinRE, offer tips and tricks for using it effectively, and, while we're at it, clear up common misconceptions around WinRE. We’ll also show how WinRE can enable a Windows 10 device that might have issues starting or applying the latest updates, get back to a good state.

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