Try just shutting your whole computer down, waiting a few minutes, then restarting. Sometimes, when I had problems with popups, I would be typing and then all the sudden the lights on my keyboard (capslock) would go off and on, and would be the opposite of what I was typing. And I had ghost typing, when I'd be typing and it wouldn't show it until I had a full sentence already typed. But when I got a popup blocker, it cleared this problem up. Hope that's all it is.
I downloaded "Quikshield" popup blocker. It has a trial version that lasts 20 days I think and then you have to pay $20 to get the registered version. I also stopped using that bullshit Internet Explorer browser, as that is what causes popups.
Instead, use Netscape 7.1 or higher.