Whilst browsing some of the seedier side of the web the other day, come on we all do it, a pop up web page appeared that i couldn't shut down. There was no red cross to remove it and right click on tool bar wouldn't shut it down either. I've come across a few of these in the past, no pun intended. Only way to get rid is to shut down. Any suggestions other than, don't surf in bad places. Everyone has to have a hobby.....
pressing ALT+ESC also minimizes the popups so you can kill them with right click/close, if you get a stubborn one then CTRL+ALT+DEL click on the popup entry and choose end task. If you have problems beyond that then the only choice is to log off the internet and restart.
to avoid them altogether, DONT GO ON THEM SITES AGAIN, (that was a waste of typing wasn't it lol)
Then open no adds scan the open windows it displays in the top select the 1 u wont to close and select add to targets the clcik hide to minimise noads it will block the popup every time it trys to open after that,it can be updated as well from master site with know popup windows and sites.