Thanks Niki, I downloaded the bazooka spyware programme (even though I have ad aware!) and foillowed all the steps, but its still happening. It probably is caused by 'adult' material, its a new (to me) PC and the woman I bought it from hadn't cleared ANYTHING out. All I can say is that I'm glad I didn't plug it in and let my kids on it! And it had 6 virus' too. She obviously didn't have a clue how to care for a PC. Less than me, even! I think I sorted most of the things out, but this error message has me beat.