Need to install Norton Internet Security. Was getting a message that NIS stopped working. Following another post, I went through Power Erase, unistalled the software from my laptop and installed the Norton Removal Tool. At the end of running that program, I got another message that Norton had stopped working. I don't see anything on their site that will allow me to reinstall - only to install on a new device. How can I get this cleaned up and get the software back on my PC? I have the product key.