How do you open Microsoft excel 2013 with windows 8?

You could check if there is a desktop shortcut or whether it is pinned on the taskbar. If it is, you just have to click it and Excel will launch.

However, if the opposite is true, then we will have to search for it. The easiest way is to simply launch the Charms Bar by pressing the 'Windows+C' key combination or move your mouse towards the top or bottom right side of the screen. From there, click on Search, and then search for Excel. Once it has been found just click on it and it will start.