Microsoft is developing a new operating system called Windows Blue which is expected to be released in mid-2013.

The update being developed under the code name Blue will include modifications in user interface (UI) and changes to the entire platform and pricing, according to ZDNet.

Following the release of Windows Blue, the Windows SDK will be updated to support the latest release, which would allow the firm to stop accepting apps developed specifically for Windows 8, further pushing developers to build applications for new OS.

According to Microsoft, applications for Windows 8 will continue to operate on Blue regardless of the planned modifications in SDK.

The standardisation is reported to be offered in the form of updates to the Windows SDK that operates across both Windows 8 and Windows Phone 8.

Following the launch in October, sales of licenses of new Windows 8 OS has reached 40 million and it is claimed to be outpacing Windows 7 in terms of upgrades.