Amazon has released its Alexa app for Windows 10, which is now available from the Microsoft Store. Alexa was already on some Windows 10 machines, but now all users in the US, UK and Germany can grab the app, with availability expanding next year. If you have a compatible computer, you'll be able to use Alexa hands-free. For everyone else, it's a matter of clicking a button or hitting a keyboard shortcut to activate the voice assistant. As ever, you can use Alexa to control music and your smart home devices, find out the weather forecast, check your calendar and carry out most tasks for which you'd call on the voice assistant.