Just out of interest, do you have files c:\windows\el.ini and c:\windows\system32\el32.dll on your pc? I also got infected yesterday by just visiting a website (actually, a political satire site, did not expect it to be dangerous at all) and it not only gave me "Antivirus 2008 XP" but also those two files.
el.ini contained a list of dodgy web addresses with the header [proxy]. It looked as if the purpose of the infection was to use my pc as proxy server to send spam. If you have el32.dll and cannot delete it, I am afraid there is still some infection left.
I found three other posts mentioning the same: Google search for el.ini and el32.dll
. Unfortunately, they are in Polish, Czech and French, respectively. The Polish and Czech posts are both dated yesterday, August 10, 2008. I am wondering if there is a new worm infecting webservers that is spreading this stuff around ...