It's not clear how many Windows 10 users are affected by the problem, but even if it's a small percentage it's still surprising this issue was never picked up during Microsoft's vast testing of the October update.
Programs and apps can be reinstalled, but any of the major folders within C:\Users\[your name] such as Documents, Pictures, Videos, Desktop and so on should also live elsewhere.
Resource ZDNet also reported that some users of laptops has faced a problem of sound drivers Intel version 10.25.0.3-10.25.0.8. While the update hadn't been pushed out to all users yet, many have already updated either as Windows Insiders or by manually downloading the update. Others still have updated multiple machines with no problems whatsoever: "I've just updated 6 laptops, 2 virtual machine and 2 desktops to the latest Windows 10 1809 update and they all went through without any issues", Redditor MrAmos123 said.
However, some users that chose to upgrade early have discovered that the upgrade is deleting some of their most important personal files. But rolling out an update that deletes massive amounts of user data with apparently no recovery option causes real harm to real people.
The company posted an update on the official Windows 10 version 1809 support page on the Microsoft website on October 5, 2018.
Microsoft's track record of releasing feature updates for Windows 10 that break things for some users continues. I didn't delete them, the update did.
The update was only available to users who actively sought it out, with plans to push it to more Windows 10 users starting on October 9th. Unfortunately, not every Windows 10 user is experiencing that kind of smooth sailing after the upgrade to build 1809. Firstly, in order to check if you've lost any data as a result of the update, you can simply head over to the Documents folder on your PC. You can download the free version of Recuva from CCleaner and restore your lost files. That means that freely available third-party software like Recuva may be able to recover them for you.