DavidR, thanks for all the info and help ...
I do have the popup that asks if I want to allow the .exe to run, and it does pop from time to time. It did not this time, so perhaps it was a script. Since I aborted deepscreen, I suppose whatever it was examining was then able to run, which doesn't sound good. I did run MBAM but it found nothing.
Actually, the gist of my question, which was probably not worded correctly, is there any way, after the deepscan has started, which is presumably before the .exe or script has started, to stop the .exe from running? In other words, stop everything cold? I don't see any buttons for that, so I assume there is no way, short of turning off the pc quickly enough.
I understand now what you mean by driveby - I clicked the original site, which popped an ad, which may have been hacked to send me to the other site.... interesting.
Thanks again.