Source: How to Geek
The Windows 10 October 2018 update is rolling out right now, but some users are reporting serious problems.
There’s also a Reddit thread full of users complaining about the issue. Here’s redditor sophormoon:
Prior to the 1809 update I had over fifteen-thousand photos in a particular folder. After the 1809 update the same folder exists with exactly ONE photo left. I have backups of the individual photos, but that folder contained a specially curated set that will take months to recreate if it’s even possible.
Stories like this are adding up, and they’re a cautionary tale. We can’t independently confirm that this bug is real at this time—none of our machines have been affected—but we’re seeing enough chatter to take this seriously.