I used to use Zone Alarm free in association with a freeware popupstopper (
http://www.panicware.com/popupstopper.html) and never used to get bothered. I recently shelled out for the upgrade to Zonealarm pro and found that it really worked well and that the popupstopper is no longer needed. I also seem to get no bother with dodgy women with webcams (

) so I am chucking Zone Alarm away