What happens next?

How to colour your computer
First, disconnect all cables in the back of your computer.
Make sure there are no adapters, wireless antennae, or flash drives in the back of it.
Open up the computer case and carefully remove all of the hardware.
Start by unplugging all of the colorful cables from everything they are connected to. Make note of where they were connected, take a picture if you need to to aide you in rebuilding the computer.