During the course of his 15-year career with the company, Muglia has been given such responsibilities as managing the development of the MSN network, the Microsoft Office suite and Windows Server applications. These days, Muglia is running the storage business he started some 22 months ago while at the same time overseeing Microsoft's enterprise management division.
But outside events may have conspired to turn this into one of his toughest assignments.
Over the last couple of years, hackers have repeatedly compromised Microsoft software by exploiting Windows vulnerabilities. The company contends that its software security is improving but allows that it remains a target for the foreseeable future.