There are sometimes bad updates that mess up your operating system. Some updates require you to reboot the computer, Many users get an unstable graphics driver which causes problems. Patch causes PC to crash repeatedly. Maybe you don't have enough internet data...
And last but not least - I don't have very fast internet access at home and some network hungry users notice every internet speed decrease. And then suddenly Windows starts to download a big update.
My keyboard doesn't let me write all dirty words you can hear at that time.
There are some solutions to this behaviour. For example, you can stop Windows Update Service. Or you can setup a metered connection and operating system will only automatically download and install updates classified as Priority.
In my opinion, the best solution to disable Automatic Windows Update is with small changes in Group Policy Editor. In Group Policy Editor, you can set that system will only notify you that updates are available.
Follow next steps:
1. Run gpedit.msc
2. Open: Computer Configuration -> Administrative Templates -> Windows Components -> Windows Update
3. Change the Configure Automatic Updates setting to 2 – Notify for download and notify for install
4. Close Group Policy Editor and open Windows Updates. Click ‘Check for updates’ to get new configuration setting