counter strike warcraft mode

I need help with my computer?
Okay, here is my problem in a nutshell: My computer won’t connect to the internet unless its by Internet Explorer.
I can not play any games on my computer (Crossfire, Ultima online, World of warcraft, Combat arms, Warrock, Soldier front, Counter-Strike). Whenever i try to load a game it will take forever to load, and it will only let me play in offline mode.
I have no firewall on my computer. Please help.
with no firewall I say a trojan… Who doesn’t even have a firewall?! I have 6 differant anti spyware and malware programs.
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