Microsoft has released an interim build of Windows Vista to its usual testers as well as to some 100,000 of the participants in its Customer Preview Program. Build 5728 includes ongoing fit and finish work based on the feedback Microsoft has received on Vista Release Candidate 1 since its release on September 1. The build includes a number of specific enhancements and changes, including the ability to turn-off start up music, general stability and bug fixing, as well as performance enhancements. Microsoft is still shooting for Vista to be available to volume license customers in November, with general availability in January 2007, a company spokesperson confirmed. But Microsoft and the European Commission are at a standoff over the bundling of security software in Vista, which could result in a shipping delay for the product in Europe.