AVG Resident Shield keeps popping up while surfing the net. Just about any link I click on causes this to happen. I can't believe every link is infected. Seems to be in my laptop. I have DSL wireless modem using WPA. I am in a rural location so nobody is near physically to hack me. AVG says I am virus free. Below is the text in the box from resident shield.

"Found ";"C:\Users\John\AppData\Roaming\Microsoft\Windows\Cookies\Low\john@atdmt[2].txt";"Potentially dangerous object";"8/20/2009, 4:18:12 AM";"file";"C:\Program Files\Internet Explorer\iexplore.exe"

Is this serious and how should I proceed?
Thanks in advance
John