Microsoft says it fixed a Windows 10 update bug that deleted folders

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Users who are affected by the issue are missing files and folders in their "Documents" folder.

Microsoft is now testing an updated version of the Windows 10 October 2018 Update that promises to fix a serious issue that led the company to pull the update following its public release last week.

An updated version of the Windows 10 October 2018 Update is distributed to Insider Channels.

#WindowsInsiders If you've run into the "missing files after update" issue for 1809/October 2018 Fall update, please call our support line. KFR allows users to change the location of those predefined Windows folders - so they can be moved to other drives, for example - but to be affected by the bug, users also needed to have kept the original (old) versions of these predefined files and folders in place. 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.

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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.

This fixed version of the Windows 10 October 2018 Update is first being made available to Insiders for final testing and after analyzing the feedback and data from the Insider community, Windows 10 October 2018 Update will be re-released to the general public soon.

Still, if you lost any personal data after proceeding, be aware that Microsoft will offer free customer support online and at its retail stores. Therefore, they are suggesting that users use their PCs as little as possible so that deleted files are not overwritten with new data.

The fixed versions of Windows are getting floated in Microsoft's Windows Insider Program, which is a program for software testers.

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Microsoft discovered in its investigation that the issue impacted one one-hundredth of one percent of version 1809 installs.

As Microsoft's John Cable explains in a post on Microsoft's Windows Blog, the problem was with the "Known Folder Redirection" feature.

Microsoft enabled new feedback functionality today that adds options to classify impact and severity of the reported issue.

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