LGA 775 Bolt-Thru-Kit ( Retail Box) Installation   - STEP 1- - STEP 2- Content of 775 Bolt-Thru Kit Remove the push pins from the heatsink. For more detailed instruction, please refer to this link. - STEP 3- - STEP 4- Place the backplate on the backside of the motherboard with the pillars through the mounting holes. Apply new layer of thermal paste to the heatsink base and to CPU and then align the four corners of heatsink to the pillars. - STEP 5- - STEP 6- Screw in spring-loaded screw in one of the four corners and then do the same with the second spring-loaded screw diagonally from the first one. Finish up installation by screwing in the third spring-loaded screw and then diagonally from it the fourth and final screw. Installation Complete