Microsoft may be getting ready to release the new Windows Blue update.

The first alleged screenshots of the mysterious Windows Blue were leaked this week, according to The Verge.

One image does not show any new features, but lists kernel version 6.3 on the About Windows screen. The kernel numbers 6.0, 6.1 and 6.2 reportedly belonged to Windows Vista, Windows 7 and Windows 8. This could mean that Microsoft may use Blue as a significant upgrade to the current software.

A source for ZDNET also confirmed that the Windows 6.3 kernel number is correct and that the first build of the Windows 8 update is being referred to as M1. The abbreviation indicates that this is the primary milestone build and is identified as the half completion stage of Windows Blue. The final stage of development will reportedly be referenced as M2.

The actual details on the update software are scarce.

Windows Blue apparently is not an ordinary service update that includes software and security updates and patches.

This new update is rumored to include features such as a revamp of the user interface, involving changes to the look and feel of Windows 8. However, it is still unknown on how big or small the new design changes to Windows 8 will be.

Windows Blue may also refer not only to an update for Windows, but to a set of coordinated updates, according to PC Magazine. Some of the updates may also impact Microsoft products including Windows Phone, Windows Server, Windows RT, and services such as SkyDrive.

Microsoft has yet to officially comment on the new upgrade.

The only time that the company has mentioned Windows Blue by name was in a recent job posting from Feb. 15 which mentioned "enhancing ease of use and the overall user experience on devices and PCs worldwide," according to Tech Spot.

If the rumors of Microsoft's progress are true, Windows Blue may be released as soon as this summer.

Tags: microsoft windows blue windows 8