Hi, Thanks for all the replies....my daughter doesn't have an admin account. I read on one of the links that this particular nasty didn't need admin rights to do its work. Apparently a message from Norton did appear, saying that a high risk infection attempt was blocked, so I don't know what happened for sure after that..... System Restore has stopped the messages and repeated connections to 'adult' sites, but I will work through some of the solutions suggested to make sure there aren't bits and pieces left.
BOAC - can MBAM be installed/run while Norton is running? I'm not familiar at all with clearing infections...I've never (knowingly!!!) had a problem before.
Mike Bracknell - thanks, I am local to you, so may avail myself of your offer if I get stuck.
Oh, the fun of it.