The verb disassemble means to take something apart. It's one thing to disassemble a computer; it's a whole other thing to put it back together again.
If you take your car to the repair shop to have a squeaky brake fixed, you'll be surprised to see the mechanics quickly disassemble your car, removing even its wheels and doors. You can use the word disassemble whenever something's dismantled or broken into pieces. Originally, disassemble meant "to disperse," or to stop a crowd of people from assembling, but the meaning changed to its current definition in the 1600s.