How do I cancel my Windows 10 reservation? Also, how can I prevent Windows 10 from downloading onto my system? I see the 'Get Windows 10' icon in my tray bar, which has been there since June 1st. Originally I wanted the upgrade to Windows 10, but now I'm not sure it's a good idea because I'm concerned that the upgrade might fail or cause problems. I read on the Internet that the 'get windows 10' icon has to do with Microsoft patch KB3035583 , whatever that is. Can you tell me how to remove the Windows 10 reservation? "