As it turns out, the issues in the Windows 10 October Update like the file deletion, or the absurd fonts were not just because Microsoft failed to do a good job, but also because we voluntarily signed up for those updates.
Apparently, if you manually click on “Check on Updates,” Microsoft will somehow consider you a “seeker” a.k.a tester, i.e., it will send you “preview” updates which haven’t been tested on a stable computer.
Michael Fortin explained the entire Windows 10 update process in a blog post —
If we go by Fortin own words, clicking on “Check For Updates” means users will see a beta Windows 10 build on their PC. So if you are a normal user who doesn’t want trouble to get your PC, I would suggest you to stop clicking on “Check For Updates” from now own. Instead, wait for the update to install automatically.
However, if it’s a major feature update that you have waiting for, you can download the Windows Media Creation Tool to get the latest update.