Remote desktop function is available on Windows platform long time ago. I always use it when I was a system engineer to troubleshoot server issue remotely. A great tool for IT support. Personally, I prefer Windows Remote Desktop function as it is a lot faster than realtime screen sharing mode like VNC provides. Both have pros and cons. Realtime screen sharing mode is preferred when other remote access to your PC for support / troubleshooting because you can see what he is going at the same time. Guest what? Google has a same tool too – Chrome Remote Desktop.