Adoption of Microsoft\u2019s Windows Vista operating system will happen at a faster pace than any previous operating system release, a software analyst predicted last week.Up to 15 percent of PC users will move to Vista within the first year that the operating system is available, said David Mitchell, the software practice leader at Ovum. "That would make it the fastest-moving operating system ever," he said.By comparison, between 12\u00a0percent and\u00a014 percent of users switched to Windows XP during the first year of its release, Mitchell said.Vista is likely to gain traction in the market from quick adoption by both corporate and consumer users. For example, companies that participate in Microsoft\u2019s Software Assurance licensing program will automatically get upgrades to Vista, Mitchell said. "On the consumer side, there has been a bit of pent-up demand. Just look at the beta adoption in the consumer space\u2014it\u2019s very high," he said.Vista will be available to business customers\u00a0on Nov. 30, with the operating system available to consumers\u00a0in January. For users who buy a new computer before Vista is released to consumers, Microsoft is now shipping Vista upgrade coupons with computers that are sold with Windows XP.The upgrade coupons mean that Microsoft will not be hurt financially by missing the year-end holiday shopping season\u2014a peak time for computer sales.While corporate and consumer users will quickly move to Vista, the adoption prospects for Office 2007\u2014which goes on sale at the same time\u2014are less clear. While many users may now see no need to upgrade, once Office 2007 starts to make its way into companies, users may find themselves upgrading to keep pace, Mitchell said.Overall, the rate of adoption of Office 2007 will be lower than Vista during the first year, Mitchell said. "You don\u2019t get the OEM drag effect. If you buy a new PC, you get a copy of Vista. You don\u2019t necessarily get a copy of Office," he said.-Sumner Lemon, IDG News Service (Singapore Bureau)Related Links:\n\nBeyond Vista\n\nForrester: Consumers Won\u2019t Flock to Microsoft Vista\n\nMicrosoft Windows Vista En Route to Manufacturing\n\nMicrosoft Taps Partners to Ease Vista CompatibilityCheck out our CIO News Alerts and Tech Informer pages for more updated news coverage.