Jason Whittaker

A new threat that comes under the guise of a genuine antivirus program has become increasingly prevalent over the past year. Offering to locate and remove malware from your PC, this rogue will actually install a Trojan on your unsuspecting system. The process is usually initiated when you click a link for what you believe is valid security software or its vendor's site.

Such adverts are not only a nuisance when browsing online -- fake ads appear on reputable sites that make use of third-party advertising -- but they are designed to rip off consumers by tempting them to pay for a worthless program. Worse still, these rogue applications infect your PC with a problem they claim can only be 'fixed' by purchasing extra software.

Despite numerous technological developments in recent years, sound tends to be overlooked by PC makers. And high-quality audio is nearly always the first thing to be sacrificed when a company puts together a budget desktop PC.

So it's good to know that the tiniest of tweaks can make a huge difference to your home audio setup -- especially if you have surround sound. It's easy to achieve that sweet spot where Beethoven is divine and Bioshock can almost literally blow you away.

You've no doubt already fine-tuned your existing audio setup, but why stop at optimizing the audio potential of just one PC? Connecting all your computers and audio devices on a wireless network does away with the hassle of transferring CDs between machines and re-downloading files.

Streaming media across a network used to require expensive and complex hardware. Not so today. Windows Media Player (WMP) 11.0 and iTunes have facilities for sharing music libraries. We'll show you how to use these services to set up a free media-streaming network.