Windows 8.1 on a virtual machine. It's much better than 8 was

I hope so because 8 just ticked me off. All of the tricks & shortcuts I used didn't work the same way and made me LESS efficient!

It's much more mouse friendly and has a more intuitive desktop. It still doesn't have a Start button (the Start Button takes you back to the Metro interface) but there is a type of Start button on that screen