This is a software tool that I use quite frequently to provide remote computer support. It is free as long as it is non-commercial use. This works with Windows XP, Windows 7, Windows 8 & Windows 10. It also works for Android devices.
Watch this video on Dailymotion - http://dai.ly/x6ij5wo
Watch this video on DTube - https://d.tube/v/jmrados/w2kilqf5
Watch this video on YouTube - https://youtu.be/FhpoqgmqnSI