Microsoft on the loss of user data when updating to the 1809 version of

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Microsoft on the loss of user data when updating to the 1809 version of Windows 10.
https://blogs.windows.com/windowsexperience/2018/10/09/updated-version-of-windows-10-october-2018-update-released-to-windows-insiders/

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One in ten thousand people lost data - that’s a lot of unhappy people!