Windows Vista may not be a mystery anymore, but most IT departments are finding plenty of application testing is required before they’ll be able to deploy the software, according to research giant Gartner.

With the OS now over five months old in the business world, IT departments have had plenty of time to scope out Microsoft's latest offering.

However, the level of application compatibility testing needed for large organizations to migrate to Vista was responsible for the many holding off, according to Gartner principle analyst Martin Gilliland

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