OT:olddog967-You're 100% correct...it is the iMac w/the Safari browser running on it, man...I've nerver seen a pop up, but on my PC...oh my, not even the XP MSN 8 prevents that headach.
I do have this program on my PC that helps w/spyware..it's called:SPYWARENUKER, first time I used it, it revealed over 3,000 "little spys" on my computer! LOL...one quick scan and they were history.