Windows 10 is currently installed on over 1 billion PCs, so this will give Microsoft a huge footprint with the Edge browser.
Now, however, Microsoft is rolling out the browser through Windows Update, which should make it available to a broader range of Windows 10 users. Windows 10 is currently installed on over 1 billion PCs around the globe, so that will give Microsoft a huge footprint with the Edge browser.
According to the KB4559309 support article, Microsoft Edge will be pushed to Windows 10 versions 1803 (April 2018 Update) and higher.
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USA — IT Microsoft Chromium Edge Is Now Rolling Out Via Windows Update, Get It...