If he's going to use IE, and he has Vista, he should upgrade to IE9 or IE10. He could also download Firefox 23 from http://www.mozilla.org and/or Chrome from http://www.google.com/chrome . Both of these will work with Adobe Flash reader.
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Good luck.
My husband's HP laptop had problems with IE8 and the Conduit Search virus thing. So I clean that off and reset IE. All the add-ons are disabled. I think this all started because he was having trouble with Adobe Flash wouldn't work and videos wouldn't play.
So I d/l and installed Adobe Flash but how to I make IE use it? Videos say you need Adobe Flash to play this video. I don't see it listed in Manage Add-ons.
Oh, he has VISTA.

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