Although it's pretty new and still under development, voice directed technology has already infiltrated consumer service related systems. Think back to the last time that you paid a bill over the phone. Instead of speaking to a human being, chances are that you spoke to a computer that not only responded to what you said and followed the commands that you gave it, it also asked you for more information such as your full name or credit card number. Okay - we're assuming that the reasoning behind hiding extensions is a "user-friendly" one because we just can't come up with any other reason for hiding them. No harm could ever come from seeing an extension, but plenty could be learned from it. Fortunately you have this article to guide you through some of the most common extensions that you'll run into. Not just a bunch of preference settings, display properties help individuals who have to deal with visual problems. Accessibility Options. Speaking of visual problems, another setting that's useful is accessibility options. This setting allows people with disabilities to use a computer that accommodates vision and hearing problems. Sure, one could upgrade the operating system to accommodate the demands of a new piece of hardware, but trouble starts when that new operating system requires new hardware in return. If we're not careful, we could end up replacing almost every hard and soft part of a computer that we own - all in an effort to upgrade! Our client insisted that he should never need more than what came with his boxed product and that we were just trying "bilk" more money out of him. As computer consultants, it's our job and mission to make sure our clients are 100% satisfied when they walk out our offices. But our job is unnecessarily made harder when people don't take the time to learn about computer accessories and familiarize themselves with the limitations of store-bought computers. Stick to a liquid-free dusting method and your dusting routine will be safe enough to repeat as often as you need. As previously mentioned, preventing dust from entering the computer is extremely important and will reduce the need to open and dust your system in the first place. The severity of outside elements (smoking, humidity, pets, etc.