Microsoft is rolling out its second annual Windows 10 update, known as the October 2018 Update (or Redstone 5), and some users report having trouble with it. The most egregious so far are reports of the October update deleting files.

"I have just updated my windows using the October update (10, version 1809) it deleted all my files of 23 years in amount of 220gb. This is unbelievable, I have been using Microsoft products since 1995 and nothing like that ever happened to me," a user wrote on Microsoft's support forum.

His is not an isolated incident. Other users chimed in with similar complaints, both in the forum thread and on social media, as spotted by MSPowerUser. There's also a growing Reddit thread on the topic.

One of the suggestions raised in Microsoft's support forum is to try rolling back the update, though that doesn't appear to restore the deleted files.

The exact cause is not known. However, it appears to be an issue that also plagued preview builds in the Windows Insider program. If so, this is another bug that managed to slip through to the final release. We reported on a far less severe annoyance yesterday, that being a Task Manager bug that causes it to miscalculate CPU usage.

As always, it's recommend that you back up your files before attempting a major update. At the very least, be sure to save any mission critical documents to a non-connected drive, like a USB flash drive or external HDD. We'll let you know if this alleged bug is confirmed, and if it is, when it's fixed.