Paco, of Large Cash.

I do not wish to make you feel bad about your choice of browser but IE is just bad. So many exploits, even with SP2.

If you can hit other webpages but not Antivirus.com then you have herpes ... I mean some type of infection or intrusion.

Symantec and many of the well-known virus scanners are targeted and the malicious code knows to look out for them (Symantec is not enough, nor is any one program.) .

Use a recent virus removal tool such as the free one AVAST offers.

Once clean, download and install Spybot (not Adaware); update it; reconfigure it so it is using all the tools (like TeaTimer, as you will need it if you insist on running IE) and run a full scan.

Or, you can download the spyware tool MS is now offering here