Nvidia’s latest graphics cards and chips throw down the gauntlet to Intel and AMD. Go behind the scenes with this guide to the big technologies including PhysX, CUDA, and games like Far Cry 2 and S.T.A.L.K.E.R Clear Sky.

Still not sure whether it's worth upgrading to Vista? We put XP and Vista through the ultimate face-off.

Yahoo! was a dominant force in the heady days of the dot-com boom. But can they still challenge the rapidly growing Google corporation?

The Internet is booming again, but this time it’s very different. PC Authority brings you up to speed with the global Web 2.0 phenomenon.

In the age of Web 2.0, people are no longer looking to a single source for recommendations for information and entertainment on the ‘Net. It’s far better to have a collective recommendation, ranked by hundreds of like-minded people. How does it work? Read on.

Craig Grannell reveals quick, efficient ways to add interactive components to websites.

An excellent release that reworks Photoshop’s core colour-correction capabilities, making them even more powerful

World exclusive full commercial download

One of the world's most popular free antivirus programs gets an overhaul - free security just gets better.