I upgraded to win 10 Malwarebytes was not working right it was using 99% my CPU, so I uninstalled Malwarebytes and reinstalled it.. then I did a clean install win 10 and installed Malwarebytes again. Windows 10 just doesn't do well on my old computer so I did a clean install back to 8.1 and tried to install Malwarebytes the license key would not work so I called what I thought was Malwarebytes support and like a fool I let them in my computer they wanted to charge me 300 bucks to fix my computer IT WAS A SCAM. I had just done a clean install of win 8.1..I didn't pay them any money but because they had been in my computer I did another clean install of win 8.1 and still Malwarebytes license key will not work. I have a PDF when I bought and a screen shot of it. I do not have same email as when I bought my Malwarebytes license key. My license key not working Please help Thank you