software that protects privacy

The best privacy prevention is you. Don't post personal info online. That's about it really. Don't post your info on Facebook, YouTube, MySpace, public forums like this, don't sign up for "free" goodies.

For viruses and spyware, AVG, Avira or MS Security Essentials are all free and good. Run the free version of Malwarebytes, or for full time protection, but the full version.