Windows 8.1

Windows 8.1 is going to be an update to Windows 8. It's rumored that the update will be free. The codename is "Blue".

Builds

Windows 8.1 build 9220 - It is unclear whether this is a Windows 8 post-RTM build or a very early build of Blue/8.1.

Windows 8.1 build 9364 - First leaked Windows 8.1 build. From Milestone 1

Windows 8.1 build 9369 - Second leaked Windows 8.1 build. From Milestone 1.

Windows 8.1 build 9374 - There was a partial leak of the PE and some files from System32.