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. Wipe up remaining dust with your anti-static rag and then reassemble the computer. 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. This is because the defrag program simply organizes the files in a system that makes it easier for the computer to access. To do so only requires a little knowledge about the locations of these applications. Let's say that every day we need to load up the Yahoo web browser, Microsoft Word, and then the calculator that comes with Windows. Instead of doing this by hand, we could write a batch file to do it for us. First, we'd load up Notepad and type in the following: START "http://www. " A couple of errors on an old, used machine are easier to fix because someone is going to have the experience and knowledge to fix it. Errors on a new machine however can be a beast to fix because we're all knocking at Microsoft's door looking for answers. 3. Convert the machine into a storage area. Shareware may or may not be limited - meaning that some functions may not be available to you until the program is paid for. These limitations are often small and don't interfere with the way its full version operations. They're really just implemented as a way to prompt payment. Remember that shareware is not freeware. Understanding Operating Systems Every new computer that's brought home from the store has an operating system installed onto it. But what most new computer users don't realize, is that without an operating system, that computer would be a simple shell of possibilities. A powered computer lacking an operating system wouldn't display anything more than a bunch of confusing text messages that describe the computer's boot process.