the Windows 10 Down...Err "Upgrade" or the easy way(s):
Never10 by Steve Gibson: https://www.grc.com/never10.htm
The name “Never 10” is a bit of an overstatement, since this utility may also be used to easily re-enable Windows operating system automatic upgrading. But the primary reason for using this is to disable Windows' pestering insistence upon upgrading Windows 7 or 8.1 to Windows 10.
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The elegance of this “Never 10” utility, is that it does not install ANY software of its own. It simply and quickly performs the required system editing for its user.
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Using this utility, inexperienced users will be able to easily use Never10 themselves, while advanced users will likely appreciate that fact that no additional software is installed and will be able to refer friends and family, whom they support, to this easy-to-use utility.
Josh Mayfield’s GWX Control Panel: http://blog.ultimateoutsider.com/2015/08/using-gwx-stopper-to-permanently-remove.html
WHAT IT DOES AND HOW IT WORKS
The goal of GWX Control Panel is to protect you from unwanted Windows 10 upgrades and notifications without disabling important or popular operating system features, and without requiring you to change the way you work with Windows. Here are some specific ways GWX Control Panel helps you:
The Disable 'Get Windows 10' App feature removes Microsoft's "Get Windows 10" nagware app from your notification area.
This is the 'Get Windows 10' icon app.
The Prevent Windows 10 Upgrades feature checks for system settings that leave you vulnerable to unwanted Windows 10 upgrades and gives you the ability to fix them.
The Prevent Windows 10 Upgrades feature also restores your Windows Update control panel to its normal behavior if it gets hijacked by Windows 10 advertisements or installers.
The Delete Windows 10 Download Folders feature locates and deletes hidden Windows 10 installer files that Microsoft secretly downloads to your computer.
The Delete Windows 10 Programs feature easily deletes hard-to-remove program files that are known to prepare your computer for Windows 10 upgrades.
The program can alert you if your Windows Update settings change from one of the safer "download only" or "check only" options to "automatically install" behind your back and gives you the chance to fix it with the Change Windows Update Settings feature.
The optional Save Diagnostic Info feature (in the right-click pop-up menu of the title bar) generates enhanced diagnostic reports that give you detailed information on any settings GWX Control Panel finds that leave you open to unwanted Windows 10 behavior.
The optional "Monitor Mode" feature runs quietly in the background watching for unexpected system changes, and alerts you as soon as any new Windows 10 settings or files are detected.
Additional Info:
http://www.howtogeek.com/228551/how-to-stop-windows-7-or-8-from-downloading-windows-10-automatically/
http://www.infoworld.com/article/2993131/microsoft-windows/disable-windows-10-upgrade-nagware-on-windows-7-windows-81-computers.html
http://www.computerworld.com/article/3049996/windows-pcs/blocking-windows-10-with-never10.html
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