A bug in Office Mix versions 3209 - 3641 is preventing the Update functionality from working as expected on Windows 7. The Update button on the Mix ribbon is not lighting up to provide notification of updates as they become available. We have fixed this issue in version 3823, released on 5\15\2015. If you are running one of these older versions of Office Mix on Windows 7, you will need to download and install the latest update of Office Mix from https://mix.office.com/home/setup to get this fix and the latest features of Office Mix. From then on, you will be able to receive updates within Mix itself as you use it. As updates become available, the Update button in the Mix ribbon will light up and you will be prompted to update as you start using Mix.