UK CIOs and IT directors say they will have to be convinced of the business benefits and return on investment of Microsoft’s upcoming Windows Vista operating system before including it in IT spending and upgrade plans.

Microsoft’s ’next generation’ version of Windows - originally codenamed Longhorn - is not due for a full release until some time in 2007 but the software giant has now revealed it will be called ’Windows Vista’ and has released a first beta version to developers.

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