exe extension, take note that although the file is compressed, it's typically a file that will install a program onto a computer. .Zip or .Sit files don't install software - they merely archive a collection of them into one, or they significantly reduce the size of a larger one. Decompressing Files Assuming that you have Winzip or StuffIt installed on your computer, you can access the files archived inside a . Although Pledge may dust your wooden tables and cabinets to a perfect shine, the oil inside a cleaner like this will erode sensitive computer parts. 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. A project management program that you're interested in may require a specific operating system, like Windows XP for example. And although this program may install just fine on a Windows 98 machine, it will generate a multitude of errors once its started. Insufficient memory will cause errors as well. As you can imagine, the cumbersome process of switching from floppy to floppy prompted the birth of the operating system. An operating system is a software program that controls how the computer's hardware (and installed software) works. It manages the activity of every component and then displays that activity as a user-friendly interface (GUI). Problems occur when the text of a button is grayed out or if it doesn't appear to sink into the screen when clicked. Check box - a check box is a small box that allows a user to indicate several choices among many. When clicked, a small "x" displays inside a box. Similar to the check box, a radio button allows a user to indicate a single choice among many. Our definition of "the best" is the fastest and the biggest, but even that leaves the computer newbie confused. Here's a quick rundown of what the computer novice should do and why. 1. Buy a computer that includes basic peripherals. Every computer can be broken down into four major components: CPU unit, monitor, keyboard, and mouse.