I could not find information about this problem, maybe it’s just so rare, I only got 2 computers with this problem out of 70s.
and then I tried to do something and it works !
The problem is some Lotus Notes cannot launch web browser by clicking a hotspot in a message, specifically cannot launch http but other protocol like ftp is working.

Hope this will help somebody outthere with this kind of problem…

• refresh (or replace design) of Local Address Book application, as we know that some configurations are put here
  
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  Actually, this did not solve my problem, but just to make it sure…
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• set the search bar to either Yahoo and Google (those two are built in there…)
  
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  in this case I tried Google
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• and then I tried to launch Web Browser…
  
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  to my surprise, this Lotus Notes 8 client innocently launching Internet Explorer !
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• and last thing to do, check it from email message to launch a link, it just works…