Quick way to Install Intel Processor

Start with your motherboard outside of your PC’s case, on a flat surface. Release the small metal lever holding the CPU retention bracket to Intel’s LGA socket in the motherboard. 

Now you can insert your chip. Make sure that you line up the two guiding notches on the socket with the notches along the edge of your chip. These notches are designed to prevent you from seating the CPU in the socket in an improper manner. With the chip seated in the socket, you can lower the retention bracket back into place. Make sure that you slip the notch at the end of the bracket around the single screw at the base of the socket before you use the metal lever to lock the CPU into place. 

When the CPU’s installed, it’s time to attach the cooler. If you’re using the stock Intel cooler there will already be thermal grease on the underside of the heatsink. If you’re using an aftermarket cooler, then you’ll need to apply a small rice-grain-sized dot of thermal grease—your cooler likely came with a small syringe of it—to the center of the CPU before you set the heatsink on top of it.
One of the nice things about Intel’s stock heatsink is that it uses push pins to attach itself to the motherboard. Simply place the cooler on top of your CPU and then press the push pins into the holes at each corner of the socket. Once the pins have been pushed through to the other side of the motherboard, press the black locking tab down into the mounting pin and twist it toward the center of the CPU, following the arrow engraved into the push pin, to lock the heatsink into place. 

The final step is to connect the fan header wire leading from your CPU to the CPU fan header on your motherboard. 

Don't forget to connect the cooler's fan to your motherboard! 

For aftermarket coolers this process can be more complex and potentially involve custom heatsink retention brackets and mounting solutions. It’s best to follow the manufacturer’s instructions and refer to the relevant YouTube videos for guidance with those products.