What caused the Data Loss problem for those who installed Windows 10 v1809

Windows 10 v1809 October 2018 Update was hit by the worst bug until now. Plenty of customers who upgraded to it reported a loss of files from their person folder. It turned out to be a bug in Windows 10 Upgrade deleted those information due to what’s Microsoft calling Known Folder Redirection (KFR) redirection challenge. Microsoft is now rolling out a set model with ISO and Media Creation choices, whereas those who have already up to date to v1809 are getting a Cumulative Update 17763.55 (KB4464330) as a part of the repair. Now let’s deep dive into what caused the information loss problem for those who installed Windows 10 v1809.

What caused the Data Loss in Windows 10 v1809

Known Folder Redirection is a way which permits one to vary the default location of folders like Downloads, Music, Documents, OneDrive, and so forth. to some place else on the PC with out altering the place they seem on the Windows Explorer.

When v1809 was below testing, a few customers reported that when this method was used, they’d an additional copy of empty folder at those default location. Microsoft added a new set of code in the October 2018 Update to take away these empty, duplicate identified folders. This modified mixed with one other change to the replace sequence, resulted in the deletion of the authentic “previous” folder places and their content material, leaving solely the new “lively” folder intact.

what caused the data loss problem for those who installed windows 10 v1809 - What caused the Data Loss problem for those who installed Windows 10 v1809

What is even shocking to notice is that this was a distant challenge which was reported by a set of customers whereas this model was with Insiders. Since Feedback Hub relies out of voting, this main challenge was buried because it didn’t get many votes from all the customers. Shared by @WithinRafael on Twitter, it’s fairly clear that Microsoft had it missed. IMO any points that are round file deletion have to be taken severely.

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Windows Team provides additional that the person information had been deleted in the following conditions:

  1. If the contents of c:usersusernamedocuments weren’t moved to D:paperwork when the location was being modified,  then a person might additionally encounter this challenge.
  2. When the person selected to redirect their folders to a different folder on OneDrive however selected to not transfer current information to new location. Since those information weren’t moved, October Update handled them as duplicate folders and deleted them.
  3. If Known Folder redirection was used utilizing an early model of the OneDrive shopper with settings to activate the Autosave function. The shopper didn’t transfer the previous information to the new location.

So if the information had been left in the previous location they the place eliminated by the Update. Now here’s what I’m stunned at. Why did customers select to go away the information after migration to a brand new location? Secondly, why had been they these folders once they had already migrated to a brand new location?

On a associated notice – comments like these ought to trigger concern to Microsoft:

The Win 10 updates are unpredictable. I’m scared to dying every time the automated updates (which I can’t disable) occur. After an replace considered one of extra installed software program cease working and want re-installing. I’ve no viruses or cracked software program. The final Win 10 replace corrupted the MBR (Master Boot Record) on my 2 laptops and 1 desktop. three computer systems achieved the identical replace at the identical time and having corrupted MBRs is NOT a coincidence. Microsoft owes $900 simply for this harm alone. i spent $300 for every pc to have the drives eliminated and put new drives in so I can maintain my information that was not corrupted in the previous laborious drives. The “reset Win 10” with out shedding private information perform in the superior settings was not engaged on all three computer systems. Thank God I had three spare SSDs as a backup, however it’s such a problem going by the previous laborious drives and saving all the information in several places. I’m switching to MAC and ditching every little thing PC associated – PERIOD!

If you misplaced your information information, you’ll be able to try to recover those files.

Windows 10 v1809 October 2018 Update is now available for download again. If you want to nonetheless play protected, you could defer the installation of this feature update.

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