Perfectly legal ways you can still get Windows 7 cheap (or even free)

Can you still get a Windows 10 upgrade for free?

Is Windows 10 too popular for its own good?

3 Methods to get a free Windows 7 license - MS Guides

How To Download Windows 7 For Free (Legally)

You Don't Need a Product Key to Install and Use Windows 10

Steam (service) - Wikipedia

4 Ways to Install Windows 7 (Beginners) - wikiHow

How to downgrade Windows 7 Editions

3 Methods to get a free Windows 7 license - MS Guides

Is it legal to download Microsoft Windows 7 for free? - Quora