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...
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.