Removing the four pin pegs of a CPU fan bracket requires careful attention and the right technique to avoid damaging the components. First, make sure the computer is powered off and unplugged from the power source to ensure your safety and prevent any electrical mishaps.

One common method is to use a small flathead screwdriver. Gently insert the tip of the screwdriver under the head of the pin peg. Apply a slight upward pressure while carefully wiggling the screwdriver. This action helps to loosen the peg from its socket. Do this one by one for each of the four pin pegs. It's important to be gentle and patient to prevent breaking the pegs or the bracket. Another approach could be using a pair of needle-nose pliers. Carefully grip the head of the pin peg with the pliers and pull it straight up. However, you need to be cautious not to apply too much force that could deform the peg or the bracket. Some CPU fan brackets may have a release mechanism. Look for any small tabs or levers near the pin pegs. If present, press or flip these mechanisms to unlock the pegs and then remove them easily. After removing the pin pegs, carefully lift the CPU fan bracket away from the motherboard or the CPU socket, taking care not to touch any other sensitive components on the motherboard. Remember to store the removed pegs and bracket in a safe place if you plan to reuse them.

It's crucial to follow these steps carefully as improper removal could lead to damage to the CPU fan, the motherboard, or other components, which could result in costly repairs or the need to replace the entire system. If you're unsure or uncomfortable performing this task, it may be advisable to seek the help of a professional computer technician or refer to the computer's manual for specific instructions related to your particular model.