Even if you can't see how to avoid installing it (ie you can't read or miss the small type that says "Click here to change upgrade schedule or cancel scheduled upgrade") then you can simply decline the EULA.

However, the level of technical expertise on reddit is noticeably lower than reddit users think, so it may be a much more common problem: PEBCAK ;-)

And given Microsoft's reliance on people accepting its EULA, I'm pretty sure it would not deliberately bypass that....

Otherwise, Microsoft stated that it wouldn't upgrade PCs updated via WSUS, so I'd be interested to see concrete evidence, because that would clearly be a mistake. Not to mention wrong.

[0]: https://www.reddit.com/r/sysadmin/comments/49nyhl/get_window...

[1]: https://np.reddit.com/r/technology/comments/4a0asv/warning_w...

This is true, and it's a waste of time, and it creates unnecessary risk. However, if you decline the EULA, it does roll back to your old OS. I've done this several times and it has worked perfectly so far.

It absolutely shouldn't be happening, but real sysadmins have the means to stop it from happening.

This is a work machine and I am absolutely livid. I can't use windows 10 to do the work I need to do, and any time I spend on this is time I am not able to earn my living. As far as I'm concerned Microsoft is trying to steal my legally purchased copy of windows 7 from me.

net stop "windows update"

That will stop it until you reboot....

After that, uninstall KB3035583 (choose to reboot later when prompted), then run the Disk Clean up tool and select the Clean up system files after the initial scan. Select the Temporary installation files for deletion. Longer version: http://winsupersite.com/windows-10/prevent-windows-10-upgrad...

If you are up to editing the registry via regedit, the key is:

HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate DWORD value: DisableOSUpgrade = 1

See: How to manage Windows 10 notification and upgrade options https://support.microsoft.com/en-us/kb/3080351

See: How to block Windows 10 upgrades on your business network (and at home, too) http://www.zdnet.com/article/how-to-block-windows-10-upgrade...

The two small text files are at https://onedrive.live.com/?authkey=!APe8Z7RJNVNc0uM&id=FEA7E...

To be honest, when I first saw the win10 update dialog I thought it was malware. The tray icon and the dialogs are stored after windows 8 so they don't look right.

http://ultimateoutsider.com/downloads/

You can turn off all updates, delete the pre-downloaded update cache, kill the tray notifications, etc. - works wonderfully on several machines I tested!

https://support.microsoft.com/en-us/kb/3080351

(and you can also simply not install/uninstall KB3035583 aka GWX)

Edit: in my particular case I tracked it down to a third party install that was forcing a windows update, so it wasn't directly an issue with MS in this case.

I'd rather endure some pain with going through the registry route, but apply a fix that addresses only one particular behavior.