For Anti-Virus I personally use Avast!
For Anti-Adware and spyware I personally use MalwareBytes
For Anti-Spy ware I personally use SUPER Anti Spy ware
Among the finest to determine the other people use and I wish to see the other people think would better. And when its easier to purchase instead of make use of the free version. The only real factor will be able to say concerning the free versions of malwarebytes and superantispyware is the fact that there's no real-time protection, neither is there scheduled checking, Needing to scan by hand is kinda an inconvenience, Sometimes I forget to scan, it might you need to be convenient to get it scan instantly.
If anybody includes a good anti-program software which has the "The Large Three of Anti-programs" included in it that's free and really works, please publish up.