I have been sent this email by, what I believe to be, a reliable source.
' Do not open any message with an attached file called "Invitation" regardless of who sent it, It is a virus that opens an Olympic Torch which "burns" the whole hard disc C of your computer.
This virus will be received from someone who has your e-mail address in his/her contact list, that is why you should send this e-mail to all your contacts. It is better to receive this message 25 times than to receive the virus and open it.
If you receive a mail called "invitation", though sent by a friend, do not open it and shut down your computer immediately This is the worst virus announced by CNN, it has been classified by Microsoft as the most destructive virus ever.
This virus was discovered by McAfee yesterday, and there is no repair yet for this kind of virus. This virus simply destroys the Zero sector of the Hard Disc, where the vital information is kept.'
I remember this old chestnut going round during the last olympics, and I think it went round during the olympics before that as well. It's a hoax - but as for "burning" the hard drive, they could just mean wiping it's hard drive which some viruses could do. It's not as if a little man with a can of petrol and some matches can jump into the computer... :-D