The new version is referred to as build 5472 and marks the first update since Microsoft ended public availability of the software.
The update offers performance improvements, bug fixes and feature enhancements requested by testers of earlier versions.
The new version improves the responsiveness of the Media Centre features in the software, and introduces support for Media Center Extender technology that allows consumers to access media on their computers through the Xbox 360 or standalone Extender devices.
Microsoft also unveiled a new pre-release version of its Windows Vista Software Development Kit that allows developers to craft applications for the latest Vista build.
Windows Vista is scheduled for public availability by January 2007. A first release candidate has been promised for the third quarter of this year.
Microsoft receives a 30 per cent cut of all purchases on the Xbox digital store
Credit card thieves used Apple ID accounts to buy and sell virtual currency for Clash of Clans and Clash Royale and Marvel Contest of Champions
$5.1bn fine further evidence that the EU is anti-US, claims Trump
New cable will connect Virginia to France