Corsair supply the H105 with an installation manual which guides us through the process. It's fairly simple, though, and we managed to install it in about two minutes, without even looking at the manual. We will be documenting the installation procedure on a Socket 2011 system.
First of all we are instructed to install the stand-off screws into the CPU socket. If you have a socket 1150 or 1155 motherboard, you will need to install the back-plate at this point as well.
Next, we can attach the two fans to the inside of the radiator, and then screw the radiator to the case. The cooler could also be installed with the fans in a pull-configuration, so they are located between the radiator and the case.
The CPU block can be easily secured down onto the motherboard, using the four thumbscrews provided. It is easy to get these tight enough without resorting to a screwdriver, which helps prevent you from over-tightening them too.
Finally, the pump and fans can be connected to your system using the 3-pin and dual 4-pin headers respectively.