But it was try to install automatically, without the Install pop-up occurring!
Windows 10 in is being rolled out through Windows Update, and most users have automatic updates set as default. Windows 10 upgrade is alike any other update, and download silently in the background and the next time you reboot your computer it will try to upgrade your computer to a new version of Windows.
An attempt was made on my computer but luckily it failed.
This has been problematic for some users that are not comfortable with Windows Metro Tile interface.
Even-though this is free upgrade, users believe they should be able to choose before going to whole new version of Windows. This really is not the intent of Windows Update. Windows Update was to keep your current version of windows, updated.
There's been quick a stir over this and Microsoft has officially responded.
Here's how to stop automatic upgrade to Windows 10 from Microsoft Support
Below is url and the actions you must take