[andrewas]

TO begin with, someone (who does not deserve to continue living on this planet) writes a virus, usualy just to get some kick out of causing misery.

From then on it propogates itself through whatever means its been designed to. In times past this meant getting onto a disc or other portable media, but recent viruses use the 'net which has a chance of reaching every vulnerable computer on the planet. Usualy even the author of the virus does not have the capability of stopping it.

If your dad says the computer is clean then, as long as he is using an up to date scanner with up to date definitions, then it should be. New viruses constantly appear though, so keep it up to date.

@Galadria: go to help->about and itll give you the version.