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When you’re upgrading or fixing a computer, you may need to take off the computer case to take parts out or put in new parts. The following steps walk you through the process of removing the computer case:

  1. Turn off the computer, monitor, and peripherals. Make sure that everything normally attached to your computer is turned off and unplugged. Your computer is easier to move around that way.

  2. Unplug your computer from the wall or uninterruptable power supply. (Unplug the power cord from the back of your PC, too.)

  3. Remove the screws from your PC’s back or outside edges. Many PCs use two large thumbscrews along one edge. Others use Phillips head screws. Some new models have sides that simply flip down when you depress a release.

  4. Remove the PC’s cover or side panel. On some computers, the cover slides toward the front; others come out the back. You may need to pull pretty hard.

  5. While the case is off, take your computer outside and use a can of compressed air to blow out all the dust from inside. Clean away the dust balls clinging to any outside vents, as well.

    To replace the cover, reverse these steps.

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