Otherwise, you can unplug and disassemble the computer to do it yourself. You'll need a can of compressed air and an anti-static rag to remove stubborn clumps of dust. Hold the can perfectly vertical and spray the fan being careful not to spray the dust off the fan onto other sensitive parts of the computer like circuit boards or inside the motor casing. We want to convince you that if you don't take the necessary steps to control that reign, you're going to be left behind further than you could have ever imagined. Computers are everywhere. Take a moment to try and think of a place a business where you didn't see a computer in use. From the small local corner store to the largest hospital, computers are in every gas station, grocery store, bank, restaurant, beauty shop, and doctor's office around. One of the easiest and least expensive things you can do to extend the life of your computer is to get rid of unnecessary programs, folders, and files. A disk drive that's clogged with unnecessary and unused files is disk drive that works harder than it has to. Although Window's defrag system can ease some of the stress that these files place onto the drive, it doesn't do much to get rid of the problem in the first place. Clicking an icon will open a tool or process a command that might also exist on a program's menu bar. Problems in this part of an interface are uncommon, however if you find yourself repeatedly clicking an icon with no results, you can correctly describe the problem by referring to the toolbar. Minimize, Restore, and Exit buttons - these three buttons are usually located on the right-most upper part of a program's interface and each allow you to minimize a program's screen, restore it to its original size, or shut down the program completely. 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. But before you can see file extensions, you need to turn them on. From Windows Explorer, click on the "Tools" menu, and select "File Options. That - and the ability to edit the content that sits on them - is what makes these phones "smart." Some of the more popular brand names include the Blackberry, PalmSource, Nokia, and Windows CE. Yet the craze is extending to even some off-brand company names. Today, it's hard to find a cell phone that doesn't offer some sort of "smart" technology because it's in such a high demand.