Note that AdAware and SpyBot S & D will each catch some things the other
won't. Also, each need to be updated before every use, even when just
downloaded. There's also a lot more to do than just those two programs.
If Ad-Aware and SpyBot S & D don't fix it make sure you also try
CWShredder.
If trying everything at that site does not fix the problem please post back
in the same thread.
3. Some porn websites redirects links to their websites using your HOSTS
file. Do a search for the HOSTS (without extension) file and remove the
entry.
4. If still no joy, download HijackThis from Spywareinfo download page
Run the program and you will find many entries. Most are OK. Post the log. I
will find the problem for you.
5. For future preventive maintenance, make sure programs cannot just
download on your computer without your permission. From the Internet
Toolbar, go to Tools > Internet Options > Advanced. Make sure "Enable
Install On Demand (Internet Explorer)" and "Enable Install On Demand
(Other)" are unchecked.