If you look in "My Account" there is an option to help stop these advertisements,you need to check off the NO option there.Also a good
AVG anti-virus 7.5 or 8.0 will also help.
If you look at the top of your page in the "tools" there is also an option there also to turn on or off pop ups.hope this helps.
I have mine set to turn off pop up on both items in "my account" in the classifeds part and also the "tools" and have NO problem with pop ups.
I also have AVG 8.0 anti virus downloaded also its free
http://www.download.com/AVG-Anti-Vir...dlPid=10861654
Works for me :P
Tom