Microsoft is looking to deliver its follow-up to Vista by the end of 2009, according to the executive in charge of building the product's core components.
That would be a much faster turn-around than Vista, which shipped more than five years after Windows XP, but Vista was exceptional, said Ben Fathi, corporate vice president of development with Microsoft's Windows Core Operating System Division.
Microsoft originally planned for its XP follow-up to include a number of radical changes to Windows, including a new file system and a reinvented user interface, but after the company's products were hit by widespread worm outbreaks in 2003, Microsoft redirected almost its entire engineering effort to locking down Windows with the XP Service Pack 2 release.
"We put Longhorn on the back burner for awhile," Fathi said. "Then when we came back to it, we realised that there were incremental things that we wanted to do, and significant improvements that we wanted to make in Vista that we couldn't deliver in one release."
Vista shipped about two-and-a-half years after XP SP 2, and Vista's follow-up is expected to take about the same amount of time, according to Fathi. "You can think roughly two, two-and-a-half years is a reasonable time frame that our partners can depend on and can work with," he said. "That's a good time frame for refresh."
Last year, Microsoft said that the code name for this Vista follow-up was Vienna, but Fathi said he could not disclose the current name. "We've been told not to use it publicly," he said.