After falling behind the competition, Microsoft has been playing catch up.
The software giant unveiled its years-in-the-making Windows 8 operating system in October. It also launched the Surface tablet -- Microsoft's first PC of its own design -- and the Windows 8 phone.
The new operating system helped Microsoft (MSFT) end a year-long streak of declining Windows sales, but the overall line of products has received mixed reviews.
Watch: Microsoft's Surface Pro: Good but not great
Microsoft has struggled to keep up with innovative rivals Apple and Google. At the same time, industry-wide PC sales have been falling as users migrate to mobile devices.
But the blue-chip tech company has a long-term strategy based on a unified experience across multiple devices. It is also betting on cloud computing.
So far, however, investors seem skeptical. Shares of Microsoft rose about 3% last year, lagging the broader market.
