Exe Lockdown (formerly Exe Vaccine) has been designed for PC users who require proactive protection against the installation of unauthorized applications. It allows users to run trusted applications and prevents the execution of non-trusted programs. It protects your PC by acting as an executable file filter. It attaches to the operating system and filters all executable files from a list of files or paths you, the administrator, provide as trusted applications. If a prohibited executable is loaded, a customizable popup box informs the user that the action cannot be performed.