How do I... Change file extension associations in Windows Vista

To determine which application will run when you double click a file icon, Windows Vista uses the familiar file extension system made famous (infamous) in earlier versions of Windows. And, just like the previous versions of the operating system, figuring out how to change a file extension association in Windows Vista can be a little frustrating if you don't know where to look.

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Mark W. Kaelin

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Mark W. Kaelin has been writing and editing stories about the IT industry, gadgets, finance, accounting, and tech-life for more than 25 years. Most recently, he has been a regular contributor to,, and TechRepublic.