Windows 10 October 2018 Update Build 1809 that Microsoft made available to early seekers did not do well, as users raised issues soon after updating to the latest version.
The issues included minor task manager bugs, a showstopper bug deleting user files.
Particularly, seeing the seriousness of missing files after updating forced the company to pull all the media out of distribution completely, including Windows Server 2019 and IoT.
Microsoft also revealed that the actual data loss comprises “one one-hundredth of one percent of version 1809 installs” users.
And, since it has now completely investigated, identified and fixed all the known issues, it’s now making available the updated new build 17763.17 to the Slow and Release Preview rings of the Windows Insider Program.
The issue was caused as Microsoft explains by the “Known Folder Redirection (KFR)” feature that when enabled, move files from folders, such as Documents, Pictures, Camera Roll, Videos, Desktop, Screenshots and more to a new folder.
Instead, the files from either of those folders were deleted due to some changes made to the logic from the feedback received from Insiders.
Now, with the fixation, the “original” old folder location and its contents remain intact.
Support for Affected Users
For those affected by data loss, “Microsoft Support” is assisting those users to recover data. This support can also be obtained from the “Microsoft Retail Stores” support services.
Additionally, users can also reach out to the Microsoft support directly at [+1-800-MICROSOFT] or look for the local support number here.
The company does not “guarantee” a successful recovery of files.
Because, the Feedback Hub did have reports of data loss, making sure to better detect issues like this, the Windows Insider team has added a new ability to flag the impact and severity when filing User Initiated Feedback.
This will help feedback hub team in monitoring “high severity” issues even when feedback volume is low.
A look at the new Feedback Hub:
Additionally, a monthly cumulative update (build 17763.55) for users who have updated to Windows 10 October 2018 version 1809 via KB 4464330 is released, as well.
The re-release of build 17763.17 for general distribution will only happen after satisfactory feedback and diagnostic data from Insiders
More information is available on the Windows 10 update history page KB article 4464619.
Here are the details on the issue identified and fixed now:
- 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).
Microsoft’s explanation of the issue:
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\, 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.