It's just my opinion, but if it means anything to you I have 4 computer certifications (A+, Network+, Server+, and Toshiba Certified Repair Tech). None of those compare to my hours of experience fixing and/or defending all types of malware (luckily I don't do it as a job anymore).
Anyway, I'll just address the AV part and recommend these:
Top choice: Avira Antivir
Runner ups: Avast or Kaspersky