A few weeks ago, I went to this website: hxxp://nimpekprg.com/download-youtube-videos-as-mp4/ And now, I cannot get rid of it. It opens when I first start a Chrome based browser.If the browser has been opened on my desk top for a few hours, it opens again in a new tab.I've scanned for adware. I've scanned with Malwarebytes. They find nothing. I've looked in the registry.WHY DOES THIS KEEP POPPING UP? I CANNOT GET ANY HELP WITH THIS.