Hi there,
Get yourself a copy of Ad-Aware from
http://download.com.com/3000-2144-10045910.html?
part=69274&subj=dlpage&tag=button
Install this program and run the Update and scan your
computer. Remove all items found by the program (it might
take a while to select the whole list depending on how
bad it is) The program will remove the unwanted icons and
any toolbars that appear in Internet Explorer.
What these icons are in short are either adware or
spyware programs. These programs, when on your computer,
either advertise a website or product (like the porn link
you have), or allow someone else (anyone really) to "spy"
on what you are or have been doing. Ad-Aware is an
absolute must for anyone who does a lot of surfing. If
you ask any of my friends, I'm probably the most anal-
retentive person when it comes to my computer and
viruses/adware/spyware/etc, but I still find about 5-10
files/registry entries per month have slipped into my
system. Ad-aware gets rid of them. =)
Hope this helps.
Nick