Windows 10 Build 17763.17 Fixes the Data Loss Issue

Microsoft is re-releasing Windows 10 October 2018 Update. After investigation, the company has managed to resolve the data loss issues in this version of the OS. A new version of Windows 10, build 17763.17, includes the fixes. It is now available to Windows Insiders.

A new blog post sheds some light on the bugs that caused the user profile data removal.

Prior to re-releasing the October 2018 Update our engineering investigation determined that a very small number of users lost files during the October 2018 Update.  This occurred if Known Folder Redirection (KFR) had been previously enabled, but files remain in the original “old” folder location vs being moved to the new, redirected location.  KFR is the process of redirecting the known folders of Windows including Desktop, Documents, Pictures, Screenshots, Videos, Camera Roll, etc. from the default folder location, c:\users\username\<folder name>, to a new folder location. In previous feedback from the Windows 10 April 2018 Update, users with KFR reported an extra, empty copy of Known Folders on their device.  Based on feedback from users, we introduced code in the October 2018 Update to remove these empty, duplicate known folders.  That change, combined with another change to the update construction sequence, resulted in the deletion of the original “old” folder locations and their content, leaving only the new “active” folder intact.   Accordingly, below are the issues we have identified and fixed:

  • Using KFR the user redirected a known folder to a different drive. For example, suppose you ran out of space on your C drive. You want to save some files separate from your primary folder, so you add another drive to your system for these.  You create “D:\documents” and change the location of the files known folder from the original “old” location c:\users\username\documents to D:\documents.  In some cases, if the contents of c:\users\username\documents were not moved to D:\documents, then a user could also encounter this issue.   When the October 2018 Update was installed the original “old” folder was deleted including the files in that folder (in this example c:\users\username\documents would be deleted; d:\documents, the new location, would be preserved).
  • The user configured one or more of their Known Folders (Desktop, Documents, Pictures, Screenshots, Videos, Camera Roll, etc.) to be redirected (KFR) to another folder on OneDrive.  For example, the user changed the location property of the documents folder from c:\users\username\documents to another folder.   During this process the system prompts the user and asks if they would like to move the files to the new location.  If the files were not moved and the October 2018 Update is installed the original “old” folder was deleted including the files in that folder.
  • The user used an early version of the OneDrive client and used the OneDrive settings to turn on the Auto save feature.  This feature turned on KFR for the Documents and/or Pictures folders based on the user’s choice but did not move the existing files from the original “old” location to the new location.  For example, if a user turned on Auto Save for pictures the location of the Pictures folder would be changed from c:\users\username\pictures to c:\users\username\onedrive\pictures, but no files would be moved.  The current version of this feature moves the files. If the files were not moved and the October 2018 Update was installed the original “old” folder was deleted including the files in that folder (in this example c:\users\username\pictures would be deleted; c:\users\username\onedrive\pictures, the new location, would be preserved).

We have fully investigated these issues and developed solutions that resolve all three of these scenarios, so the “original” old folder location and its contents remain intact.

An updated version of the Windows 10 October 2018 Update is now released to Insiders. Microsoft is going to collect feedback and check it closely. After that, the company will push the feature update to the production stream. The exact date of this event is not known yet.

Source: Microsoft

9 thoughts on “Windows 10 Build 17763.17 Fixes the Data Loss Issue

  1. Gay Martin

    The fail is strong within 1809.

    Reply
    1. Sergey Tkachenko Post author

      LOL yes.

      Reply
  2. alex

    Hi
    and KB4464330 (17763.55) is out! included in my own custom iso ^^
    just updated from 17134 like a charm

    regards,
    alex

    Reply
    1. Sergey Tkachenko Post author

      Hi alex,
      Yep, I covered it separately.

      Reply
  3. alex.b.

    is there a download link as i use a RS4 but x64 enterprise edition , i cannot find a this new dwload link ISO FILES anywhere ??? Is there a RS 5 X64 bits or bytes a Enterprise edition ISO SOMEWHERE to get it ….thank you for phantastic blog i am your newsetter follower and i read i am gratefull , danke or thanks or gracias ….mister sergei … @-@

    Reply
    1. Sergey Tkachenko Post author

      Microsoft has pulled the ISOs. The new fixed version is on the way to users.

      Reply
  4. alex.b.

    thank you sergei, i am having a WIN 10 ENT X 64 BITS RS4 version and it says this tool doesnt work for my windows version / i ve already tried twice to upgrade but it says or*undoing changes or upgrading error ???? and if you know how to upgrade or anytool or idea FOR ENTERPRISE VERSION x 64 , thank you for help ….this is good and great blog and maybe you get a iso files links for download i use enterprise edition x 64 RS4 …thanks

    Reply
    1. Sergey Tkachenko Post author

      could you specify please what tool we are taking about?

      Reply
  5. alex.b.

    i didn not use tools * i did upgrade to enterprise x 64 a build insider build v 17558 thats last and iso file normal *talking about versions 17760 or 17760.1 iso i cannot find a LSTB enterprise x64 to upgrade , the enterprise version LSTC is not for me …. and if anyone see a ofitial iso for enterprise build and last RTM please show me dwl link , thank you ….@-@ i use from now a WIN 10 ENT X 64 BUILD v.17558 it s stable and last ofitial build and it s a LSTBranch enterprise version not LSTChannel version ????? i dont have that 1809 17760.1 build ??? for enterprise LSTB !!!!

    Reply

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