Sinofsky joined Microsoft as a software design engineer in 1989. Before heading the Windows division, his work included overseeing the development of Microsoft Office products.
Larson-Green has been with Microsoft since 1993. She was responsible for program management, user interface design and research, as well as development of all international releases for Windows 7 and Windows 8, Microsoft said.
In her new role, she will be responsible for all future Windows product development in addition to future hardware projects.