The visual focus of the page is a carousel of bland stock images. A smiling person on a laptop representing Office, a group of people climbing a mountain to represent Visual Studio. A crass waste of space.
Everything between the carousel and the footer is just filler. Nobody goes to the Microsoft homepage because they want to 'Discover' Windows or Office, or because they want to see some vapid corporate news.
Everything else is just navigation. An enormous amount of redundant navigation. Missed the link to Windows in the header? Don't worry, we put one in the carousel as well. Miss that too? You silly billy, we put one under the 'Discover' heading just for you. Miss that one? You should really get your eyes tested, but in the mean time, we put another link the footer for you.
Compare this to the Apple homepage. No stock images, just one big image of their latest product. A small number of interesting product updates (even if they are of the "A letter to our customers regarding Maps" kind of interesting) and navigation. Done.