Firewalls (49 programs)

Pros: Reduces the priority of other programs when it is activated. It identifies what causes short CPU spikes that slow your computer.

Cons: Most people are nervous about giving a program access to their processes. It looks free but they charge you after the 30 days trial.

Pros: Easy to configure. Offers very tight protection. Trusted Zones feature.

Cons: Pop-ups can get annoying.