To prevent re-infection in the future:
1.I suggest you download Spyware Blaster to prevent the installation of Spyware in the first place.
2.IE-Spyad puts over 5000 sites in your restricted zone so you'll be protected when you visit innocent-looking sites that aren't actually innocent at all and I suggest you download it.
3. I noticed that you do not have a firewall and that makes you vulnerable to Hackers. I recommend you use Zone Alarm or Kerio Firewall
4.I recommend that you read a thead titled So how do I get infected in the first place? by Tony Klien which informs you on how to tighten the security of your PC.