---Free Spyware/Adware Removers---
These are the ones that from what I have experienced and what others have experienced as the best. I've used all three, and I'm currently have all 3 on hand. Just make sure to have one active, or they will crash. There simply isn't one that is 100% perfect, so each program makes up for each one's mistakes.
1. MalwareBytes Anti-Malware (
http://www.malwarebytes.org/mbam.php)
The free edition does not have an active guard, but if you have a Firewall and AV in my opinion, it doesn't really matter. It came first in all my tests, and it is highly recommended by computer security experts. It is again easy to use, offers fast scan times and therefore is ranked No. 1 on my list.
2. Ad-Aware (
http://lavasoft.com/)
The original Adware/Spyware remover, and although there has been some complaints of its scanning rates it found things MalwareBytes missed, and also didn't find things MalwareBytes found. User interface is easy to use, good scan rates. However, I recommend having another program because it's scan rates are not fantastic.
3. Spybot Search & Destroy (
http://www.safer-networking.org/index2.html)
A solid application that scans your computer for various popular infections, and is very successful in doing so. Again, its scan rates are even lower than Ad-Aware, but it finds things that both MalwareBytes and Ad-Aware will not detect. User interface just takes a bit to get used to, but its again relatively easy to use.