Microsoft bids farewell to Windows 7 and the millions of PCs that still run it - The Verge

Windows 10 end of life could prompt torrent of e-waste as 240 million devices set for scrapheap : r/Windows10

Windows 7 is no longer supported and Microsoft doesn't sell it anymore. Can I legally use it? - Quora

Windows 8 - Wikipedia

Microsoft bids farewell to Windows 7 and the millions of PCs that still run it - The Verge

Windows 8, Microsoft Wiki

Microsoft Faces the Post-PC World - WSJ

Internet Explorer (browser)

Microsoft Kicks Off Windows 7 Push - WSJ

Windows 8, Microsoft Wiki