There is a long list of antivirus that you can use. I prefer Norton, Bitdefender, Kaspersky, Immunet Plus, Avira or Avast. These are some of the names I trust for my PC. Firewall, Ad/Spy-ware is different protection tools made to protect your PC from Spyware and firewall provides you browsing security. You can go for malwarebytes for spyware protection.