I’ve been telling people that iCloud isn’t a safe place for backups. Please save your data to another option. I use Google Drive / my Gmail account for backups – 15GB of space at no cost!
This is why I recommend NOT using Windows automatic updates, but rather waiting until several days have passed after release, in hopes that any bad updates are withdrawn. Sad situation!
As always, contact us if you need help with this, or any other problem.