Windows 10 Asking Me To Back Up My File Encryption Key But...

  1. Posts : 17
    Windows 10 Pro

    Windows 10 Asking Me To Back Up My File Encryption Key But...

    Hey folks,

    Today, all of a sudden, a notification prompt appeared and Windows 10 asked me to back up my file encryption key. (I'm on W10 pro with the latest stable update)

    I was pretty sure I haven't used any kind of encryption in my life.

    I googled for a while, but failed to find a possible reason for my case.

    Then I used the command below to see if there's any encrypted files on my system.

    cipher /u /n /h > %UserProfile%\Desktop\Encrypted-Files.txt

    And well, it found dozens of encrypted files: Each one is somewhat related to Microsoft, Windows or Windows store apps.

    Here are few examples:


    C:\Program Files\WindowsApps\Microsoft.SpartaUWP_9.9.0.2_x64__8wekyb3d8bbwe\AppxBlockMap.xml


    C:\Program Files\WindowsApps\Microsoft.SpartaUWP_9.9.0.2_x64__8wekyb3d8bbwe\xboxservices.config

    It's pretty clear that the Microsoft Sparta UWP is Gears of War 4. And it's installed on E drive. But the weird thing is the exact same files exist on the drive C (OS drive) as well.

    There are also some other files also related with Microsoft in AppData folder.

    Few examples:

    C:\Users\XXX\AppData\Local\Packages\Microsoft.SpartaUWP_8wekyb3d8bbwe\AC\INetCache\SWN3SS7J\image1HG ZMNUG.png

    C:\Users\XXX\AppData\Local\Packages\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\AC\AMD\DxCache\cache file.bin


    Another weird thing is these exact files also exist on E drive under WpSystem folder, and in a folder with lots of numbers (starting with S-1-5-21-.....)

    Some of the related folders on the C drive are actually look like shortcuts. But the ones on the E drive are not.

    I don't know if it can be related to something or can mess up with stuff like this but I'd changed the default App download storage to E drive for Gears of War 4 a few weeks ago. It actually make no sense to have some files related to MSPaint or Cortana on my E drive.

    I decrypted most of those files manually by the way. Don't know how to do that for the ones in WindowsApps folder though, since I can't see their content.

    Any ideas? What did possibly go wrong? Any way to fix this and prevent to happen again in the future?
      My Computer

  2. Posts : 17
    Windows 10 Pro
    Thread Starter

    A small update:

    If I switch to local account and switch back to my MS account, the files that I decrypted manually are getting encrypted again.

    Same thing happen if I re-register Windows apps.
      My Computer

  3. Posts : 17
    Windows 10 Pro
    Thread Starter

      My Computer

  4. Posts : 83
    Windows 10 Professional

    Is BitLocker active? Press the Windows Key and type Manage BitLocker. See if BitLocker was accidentally turned on.
      My Computer

  5. Posts : 17
    Windows 10 Pro
    Thread Starter

    Xilnik said:
    Is BitLocker active? Press the Windows Key and type Manage BitLocker. See if BitLocker was accidentally turned on.
    I forgot to mention I guess, no, BitLocker wasn't active.

    That guy also had the exact same issue a while ago.

    Creators Update - back up encryption key message? Solved - Windows 10 Forums
      My Computer


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