Tails is one of my favorite operating systems. It's a great platform if you're looking to transition from Windows to Linux, plus it offers top notch privacy features and tools out of the box. Among the main improvements in Tails 3.0 (based on Debian 9) we find a new startup and shutdown experience, a lot of polish to the desktop, security improvements, and key upgrades to the included software. You can download here and read the complete release notes.
Microsoft officially ended their free Windows 10 upgrade program in late July. For those that did want to upgrade but didn't get around to it, there are still a couple of known ‘loopholes’ to get a free Windows 10 upgrade which Microsoft hasn’t bothered to close, even five months after the offer officially ended.