> If you want to do some math on Windows at a single keypress, you need to turn on Cortana which only became availble in Windows 10. When I've wanted to do som

> If you want to do some math on Windows at a single keypress, you need to turn on Cortana which only became availble in Windows 10. When I've wanted to do some quick calculations on a Windows PC at a single keypress, I've pressed the calculator button on my keyboard and a calculator has come up. And this has been true since the turn of the century (for me personally; for Windows for several years longer than that).