Without using Registry tweaks or hacks, several of us W10 testers have found that it's not possible to completely eliminate your W10 PC from getting the weekly push-updates from MS. However using these 2 links can help mitigate them:
Another good idea, is to make regular Image Backups from 1 of these 3 tested apps on W10 in case you get an update that comes into one of your computers and scrambles them. 1.) Macrium Reflect
2.) Acronis TrueImage
3.) EASEus ToDo
Totally agree updates are important. But I want them when ***I*** want to reboot my system, not when Windows has decided it's time. It wouldn't be so bad if I could just tell it "only reboot on weekends," but it seems every time it ignores what I told it last time.