There are lots of changes in this new build. Some of them are as follows:
* The infamous UAC issue has been fixed. In previous Windows 7 builds when you changed the UAC level, Windows didn't show any prompt message. It was dangerous from security point of view as a malware can turn off UAC on a system easily. * New user display pics * New Wallpapers * New Icons for few programs * New login screen
Windows 7 Build 7057 x64 (64Bit)
The information state that it is a pre-release of the Windows 7 RC family tree that is expiring on March 1, 2010 and an extended expiration date of June 2, 2010.
This build can also be activated with the following product keys ::