Could be a lot of things, and to really know the answer you'd need to know specifically what bit of malware she's been inflicted with. Some are part of a botnet, that will generally only operate when they're given some kind of command, others have a predefined set of operations to carry out... So there's really no answer to the question without knowing what specific bit of malware she's been hit with. Just some general possibilities like I outlined.
A friend of mine has some sort of virus on her computer that causes it to periodically send out spam e-mail. She is working on that but I have a question.
There doesn't appear to be any rhyme or reason behind when it sends one out and it doesn't happen often. Is it possible that it only happens when she opens her email? Does anyone know what "triggers" the program to send one out?
I know it's a minor point but I'm curious. Any thoughts would be greatly appreciated. Thanks!