Microsoft has rolled out its first new logo since 25 years of its launch of earlier logo, prior to its unveiling of Windows 8 operating system which is expected to power the company’s own Surface tablet and other touch-screen devices.

The new logo has the symbol for Microsoft’s Windows operating system — four squares in red, green, blue and yellow, drawn to the left of the name Microsoft in grey in a segoe font.

Microsoft said, "This wave of new releases is not only a reimagining of our most popular products, but also represents a new era for Microsoft, so our logo should evolve to visually accentuate this new beginning."

The logo has two components, which include the logotype, which is developed using Segoe font and the symbol, which is claimed to be important in a world of digital motion.

The firm has also refurbished its product line up which includes Windows, phone software and the Xbox game machine to compete with Apple.

According to Microsoft, the coloured squares in the new logo are similar to the tiles created on touch-screen phones and tablets, while it is currently in use on Microsoft’s website.