I've seen a lot of posts here detailing how to rip GWX's guts out in order to prevent unwanted Win 10 upgrades/downloads. These usually involve un-installing updates and trying to avoid new GWX laden updates.
There is another way to approach this, and it does not involve un-installing or avoiding updates. In fact it's even MS supported (albeit though their marketing bods gritted teeth, I expect!)
Here are some instructions that I wrote about a month ago for some friends. Note that the updates mentioned in these instructions (3083324/5) might have been superseded in October updates - I've not had a chance to review that yet.
Once a Mod has reviewed these instructions.. you may want to make them more accessible.
Here we go.....
Logged in using an account that is an administrator of the PC, copy/paste the contents of the code window below into notepad and save it as "DisableWin10Upg.reg" (ensure that you save it as type "all files" so that you don't end up with a hidden ".txt" on the end of the file name). Then double click the file. You will get a “User Access Control” prompt, and also a warning telling you only to proceed if you trust the file. Accept both of these prompts (you should get a prompt saying that things have been added to the registry), then reboot.
The registry settings rely on the presence of a certain Windows update. If you do not have this (or a superseding update) installed, then install it:.
Windows 7: https://support.microsoft.com/en-us/kb/3083324
Windows 8.1: https://support.microsoft.com/en-us/kb/3083325
Note that these updates supersede the updates mentioned in the other knowledgebase article that I refer to below. These updates are included in the September Windows updates that you should receive automatically. If you have run Windows updates since the middle of July, you should have Update 3065987 or 3065988 already, either of which will be just as effective at blocking unwanted Windows 10 preparations and offers. You will observe that the get windows X application (GWX) disappears from the notification area near the clock after the reboot.
This knowledgebase article confirms most of the things that I refer to above – It’s meant for IT administrators, so is a bit technical... https://support.microsoft.com/en-us/kb/3080351
Contents of "DisableWin10Upg.reg":
Windows Registry Editor Version 5.00
Once these instructions have been implemented, the GWX notification area icon does not appear, the automatic background download is disabled, and upgrade offers and prompts no longer occur.
There is no need to avoid any Win7 or Win 8.1 updates or second guess which of those updates include GWX technology.
I've been running with these settings (on Win7 Ultimate) for several weeks, and am still blissfully Win10 free on the system to which I applied the settings.
Edited by x64, 15 October 2015 - 01:03 AM.