Good malware,spy and viruse terminator?

hey y'all,my computer seems to be infected with some kinda trojans,malwares and viruses but i can't find them and remove them.i used many kinds of Antiviruses and Antispies but none of them worked.the sign of this viruses and malware are,after about 2 or 3 days that i install the new window i can't access some websites like google,yahoo,isohunt,..... and every time i start IE7 an additional page opens up and tells me that my computer is infected with some viruses and malwares and i have to download the software that it offers me.it it's self sounds like a virus!!i used Kaspersky,Avast,Nod32,Spyware terminator,Norton but none of them worked well for me.if you guys have any suggestion about how can i survive this ultimate suffer! i'd be really glad to hear that.also i'm not in situation to afford format my whole hard disk.thanks.

Good malware,spy and viruse terminator?norton 2008

These days you need a whole lot more than just a virus protection. Only about 15% of all malware is viruses. The rest is worms, trojans, phishing schemes, spyware, etc.

Here's some ideas to make Internet Security Suite (securitycenter) for free. Free is always the best.

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1. For your Anti-Virus......(Always use only 1 A-V...You must NEVER use more than one anti-virus, Even an expired anti-virus can cause a major conflict...(did I mention that you MUST uninstall any old anti-virus products?)