System Safety Monitor 2 is available in a free version from the developers website. The tool basically works as a firewall preventing malicious software to be started automatically. The free version runs in paranoid mode which means you have to allow or disallow every process and get nagged quite a bit at the beginning. Once the majority of rules are established the software runs a lot smoother and seems to come forth only when you tend to install a new program or change existing ones.
System Safety Monitor 2
System Safety Monitor (SSM) allows you to track down Microsoft Windows operating system activity in real-time and to prevent undesirable actions from various malware and spyware programs. SSM’s main goal is to discover and block malicious actions of any application.

