What does this message mean on my computer?

Sometimes when I'm on different websites on the computer a message will pop up with a creepy sound like 'dum' It says debug attemption failed. I always get really nervous when this happens so I never read what it really says. All I know is the choices are abort, retry, ignore. If i hit anything other the abort, my computer freezes and I have to shut off the power source. When I hit abort, it is fine, but when I exit out of the website it pops up again and I have to abort again. Is this a virus or something? It never seemed to actually hamr the computer...