What procedure does Kevin need to perform to protect the building from unlawful entry after working late?

To ensure the safety and security of the building after working late, it is essential to activate the security alarm. Setting the security alarm acts as a deterrent to potential intruders and ensures that the property is protected against unlawful entry. This procedure helps to notify local authorities in case of unauthorized access and increases the overall security of the premises.

While turning off the lights may reduce visibility into the building, it does not actively protect against unauthorized entry. Logging off the computer is important for data security but is not directly related to physical security. Locking filing cabinet drawers is also a good practice for securing sensitive information; however, it doesn’t address the overarching need to protect the entire building from external threats. Therefore, activating the security alarm is the most effective procedure to safeguard the building after hours.