In mid July 2007, Microsoft confirmed that it made a pre-beta version of the first service pack for Windows Vista available to a select pool of testers. The Redmond company then subsequently put to rest rumors of a public release of Windows Vista SP1 in the immediate future. However, the select group of Microsoft testers challenged the company on the private nature of the pre-beta SP1, and the built was leaked from under Sinofsky's Windows Omerta to torrent trackers worldwide at the end of the past week. Steven Sinofsky, Senior Vice President, Windows and Windows Live Engineering Group and the leader of Vista SP1 and Windows 7 (Seven) projects, failed to limit an "artificially public" version of Vista SP1 offered for download via torrent websites.

Even before the actual official testing build of Vista SP1 from Microsoft, screenshots of Vista SP1 were released confirming the availability of the build, much more than Microsoft was ready to do officially. In this context, Windows XP SP3 also took the same trajectory as Vista SP1. Images from within the third service pack for XP were published in advance on the first torrents and downloads becoming live. And while Microsoft is still mute to all details associated with Vista SP1, APC and Long Zheng have dug up a few items demonstrating the evolution of Vista from RTM to SP1.

The full build tag of Vista SP1 is 6001.16549.070628-1825, representing the move from Vista's kernel to the core of Windows Server 2008, formerly codenamed Longhorn. The pre-build version of Vista SP1 delivers no additional features with the exception of the "Create a Recovery Disc" maintenance tool. Microsoft has yet to implement the changes to Vista's default Desktop Search mechanism to accommodate third party solutions. Perhaps that will come with the first public release of the service pack. Additionally, there are some minute alterations to the Vista graphical user interface and to the sound properties window, as well as newly introduced updates and hotfixes and DirectX 10.1.

Microsoft only confirmed that Vista SP1 Beta will be released by the end of 2007, with speculations pointing to November. The company also seems to head for a 2008 release of the final version of Vista SP1.