Many times when I start my computer (Win XP PRO) I get an error popup: "RUNDLL error loading yyyy" the specified module could not be found. Above each letter of the yyyy are 2 dots (strange characters). I am not sure if it is a virus since in IE7 recently started to load a popup window with an adult pictures& this happens every 2-3 minutes while I surf net.
Anyone can advice? On my PC I have Norton 360, I run an update and a full scan but it found nothing.