Here's some awesome news for Windows users: You'll be able to upgrade to Windows 10 if you're still using Windows 7. This is particularly significant because before Microsoft only confirmed that upgrading from Windows 8.1 would be free. However, Microsoft is determined to end fragmentation in its Windows empire and there's no better way to do that than by giving away its newest software to users for free.
Awesome news: Windows 10 will be completely free for Windows 8 and Windows 7 users