There has been a lot of talk lately regarding the status of Vista Service Pack 1 (SP1), but Microsoft has stayed clear from confirming both the expected features and release date. Several different sources have confirmed that Vista SP1 is indeed being tested by a small group of people, but it’s not in the form of an update yet. Testers reportedly have to use an installation disc that contains the full Vista operating system in order to test Vista SP1, which is probably why they haven’t made it available to the public yet. In fact, the screenshot below even shows that the current SP1 is treated as an evaluation copy that expires in April 2008.

Vista isn’t the only one with a new Service Pack in the works though. Windows XP SP3 has also been spotted in the hands of testers, and it weighs in at 350MB. It includes over 900 fixes for the operating system, some of which have already been provided to XP users via Windows Updates. With XP SP3 being tested at the same time as Vista SP1 it is expected that the two will have the same release date.

Below are the build ID’s and screenshots from the XP SP3 About screen and Vista SP1 About screen. By reading those ID’s you are able to extract the date of the builds, with Vista SP1’s being June 28, 2007 and XP SP3’s being July 18, 2007.

  • XP SP3 ID: 5.1.2600.3180 (xpsp.070718-2058)
  • Vista SP1 ID: 6001.16549(longhorn_sp1beta1.070628-1825)

Vista SP1 & XP SP3

Source: WinBeta & AeroXP