Been surfing porn again, eh?
That happened to me as well off of an on-line shopping site. Shut down, reboot, and when the re-boot first starts, get it to run in safe mode. It may take a few tries to get it to do this. If you can get to your program manager (as in "Cntrl-Alt-Del"), then you can delete the program that is causing the pop-ups from the open programs menu. That won't remove it, but it will stop it from running momentarily.
Then download Malwarebytes Anti-Virus program.
http://www.malwarebytes.org/ The free version works great.
Run that and it will clean all that shit out of your registry. A Trojan is actually loaded into your computer - you have to scrub it all out.