I Googled Windows 10, and learned:
1) Depending on who's counting, Windows 10 was either Windows 98 Second Edition or Windows 7.
2) Someone has already posted screen shots of Windows 10 on YouTube. Actually, it's his own conception of what Windows 10 will be like, but he's serious.
If you would like to install Windows 10 on your computer, please click this link: Windows 10 - Installation Prank - YouTube