Yeah, the offline installer behaves just the same as the online one does. UAC asks if I want to allow the program to make changes, I respond "Yes", then nothing. When I look in the task manager, there are four instances of the google installer in the processes tab and nothing in the applications tab.
Dan;
If you are referring to the "Get Windows 10" icon in the system tray of the task bar. The easiest way to get rid of it is to go into the "Notifications" app in the control panel and set the options for the "Get Windows 10" notification to not be displayed. If you want to remove it completely, which will make upgrading to Windows 10 for free more difficult, try googling "Remove Get Windows 10". Just hiding it is the preferred method as you can always unhide it if you decide you want to upgrade. Microsoft apparently sets a flag somewhere that they've already sent the "Get Windows 10" app to you because once its removed there appears to be no way to get it back.