New
#21
Heya there (: Of course, paying for your security is generally the best choice, but...
As a scanner, you can use TrenMicro's HouseCall
For further protection, you can use both Superantispyware and Spybot
For more high-profile malware, you can use HitmanPro. There's a free trial offered, and it will continue to remove cookies even after the trial expires. For malware, you have to buy the full version after the trial expires.
As for firewall, I agree with everyone else. Windows firewall is one of your only ways. Just do scans *very* frequently. If you know how to use Linux or BSD, you can set up free firewalls in a virtual machine.
To prevent infections, I recommend you use Sandboxie. You can find a great tutorial here.
And always generally just be safe.