My neighbor asked me to look at her computer. It was running extremely slow and acting up and none of her programs will open and she cannot download anything. I tried installing malwarebytes and it would not open for me to install. I tried opening other programs and such that she already had installed on her computer and they too would not open. While I working on her computer she proceeds to tell me that last summer she had a window pop up and would not go away. It told her that windows detected a problem with her system and if she paid they would fix it for her. Not knowing what she was doing she paid it. I believe she was attacked by ransomware. She is afraid that they are going to pop back up and ask for more money. Can I remove this by just re-installing windows or should I wipe her hard drive and then install windows? And, if I hook her hard drive to my computer what do I have to do to mine to protect it from getting the same ransomware?