The only reliable way to go back to 7, is to see if you have a factory reset partition on your machine, which is still Win7, or better.. did you CLONE your Win7 before you 'updated' to Win10? For only a clone made just prior to update will get you back to the way you were. The so-called windows.old file Win10 makes is only good for about five minutes afterwards. For then an update to Win10 comes along, and your windows.old file won't work anymore. For Win8.1 it's a tad better, but most people updating from Win7 can't go back.
As for Win10, only Enterprise can delay updates for a very long time. Else, you cannot select among them, and you cannot shut them off. You can set the machine on notify, so it won't download or install, but for how long a mere notify will work, I don't know. Pro does NOT get you out of the updates. People saying Pro will get you out of updates, are ignorant of how it works. Updates are forced for everyone, but only Enterprise can delay (not forever and not all updates) and have some choice.
So I just keep the Win10 offline. Can't download when it's not connected to the internet. I don't even use it anymore.
The same gimmick is being tried with Windows 7, but so far it can't work until and unless some other patches precede, which thankfully violate the Windows 7 EULA so you'd have to agree to forced updates. I shut all mine OFF: that makes them MANUAL, so Windows never ever sends me anything. I have to go ask for it. That's what I'm telling all my clients to do, too.
So manually, once a month or so, I go check for updates and then SELECT which ones I want. Generally, most of them are not at all related to anything I need, and I hide them. Security updates tend to be valid, but even then read the KB article carefully. My trust in MSFT's truthfulness is now nearing zero.
Edited by brainout, 31 August 2015 - 06:52 PM.