Do I have enough antivirus/spyware/Adware protection with just Ad-Aware and Spybot S&D?

Right now I have the free version of Ad-Aware and Spybot Search and Destroy. Are these enough for computer protection? Do i need AVG or Avast in addition to these? Can i get rid of any of these? I also have Crap Cleaner (CCleaner), but that’s is more for deleting internet files.

Well not softwares but your decision affects the computer.
YOU need YOURSELF for total protection.
YOURSELF needs security knowledge.

Avast! Home Edition Review