Microsoft told us: “For individuals who have chosen to receive automatic updates through Windows Update, we help upgradable devices get ready for Windows 10 by downloading the files they’ll need if they decide to upgrade.

Source: Microsoft is downloading Windows 10 to your machine ‘just in case’

From: The Appeal of Free: 75 Million Users Download Windows 10 in First Month

Free Windows is proving to be a very attractive price indeed. Seventy-five million users have downloaded Windows 10 to their personal computers and tablets in the first month of its release, Microsoft announced on Wednesday.