The web site was hxxp://www.nlpweekly.com/index.php?action=forum. I have just been to the site a few minutes ago, and all is well now.
My suspision is that it was a firewall glitch.
This is the last few days report which doesn't show anything untoward - at least to my uneducated eye.
My thanks to you both for your input to my non technically generated panic,
avast! Real-time Shield Scan Report
* This file is generated automatically
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* Started on: Monday, July 12, 2010 10:43:42 AM
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* avast! Real-time Shield Scan Report
* This file is generated automatically
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* Started on: Tuesday, July 13, 2010 7:22:03 AM
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* avast! Real-time Shield Scan Report
* This file is generated automatically
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* Started on: Tuesday, July 13, 2010 10:36:43 AM
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* avast! Real-time Shield Scan Report
* This file is generated automatically
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* Started on: Wednesday, July 14, 2010 9:54:28 AM