Just a quick comment before I duck my head ;-)
A popup stopper that worked well for me version mkii freeware available somewhere around here
freesurfer
I think they latest version might have gone shareware
I am using someone else's 'puter and can get away with loading app's on it which are easier to close down rather remebering all the settings to change
Though I will implement all the good advice above (well at least try it out ) on my own computer