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    Hi, today - after installing a firmware upgrade for windows10 on my surface 2 and a first successful reboot - I checked again for updates and found a new one that failed to install (didn't write down the error code, there was no specific explanation).
    After a second shutdown I've got a 0xc00021a on reboot.
    I don't have a backup or a restore point. I then followed the suggested steps to troubleshoot this error. I tried the "verify.exe" utility for drivers, which did not help.
    I tried the Windows Settings "Troubleshoot" options: "Reboot" and "Safe mode with network", then I tried to "Disable driver signature enforcement" with no luck (same error).
    Then I tried to reset the system from a Windows 10 USB installation, with the option "keep my files", but, surprisingly, I got the same error again and the process rolled back.
    I really appreciate any help to solve this problem!
    03-09-2016 02:36 PM

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