Trev
Just to emphasise the points Grandpa and I have been making in this thread look at the news report, published by the BBC, that I have just come across.
http://news.bbc.co.uk/1/hi/technology/4521844.stm
It shows that we have not been blowing smoke at you, the dangers out there are real.
UK Bob
PS. Please pay special attention to the "PC Safety Tips".