1. If you have Windows Messenger Service, disable it. The Messenger service
is typically not needed for home users.
Right-click My Computer and click Manage.
Click Services and Applications.
Click Services.
Scroll down to Messenger and right-click.
Stop the Service.
Choose Disable as the Startup Type.
Click OK
2. Use Popup Stopper to get rid of the popups from the Internet.
http://www.panicware.com/product_psfree.html
3. Use the following scanners to find and remove the popup.
SpyBot S&D searches your harddisk for so-called spy- or adbots;
http://security.kolla.de/
or
Adaware
http://www.lavasoftusa.com/software/adaware/
or
CoolWebShredder
http://www.spychecker.com/program/coolwebshredder.html
4. 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.
5. If still no joy, download HijackThis from Spywareinfo download page
http://www.spywareinfo.com/program/hijackthis.html
Run the program and you will find many entries. Most are OK. Post the log. I
will find the problem for you.
6. 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.