I'm getting a spammy pop-up on my desktop when I start my PC, looks like a native clickbait ad (see attached image). Is this a sure sign I'm infected with a virus/malware, etc? The spammy window has only shown two times so far. I am not running any programs or browsers, etc. when it shows, only on startup. My PC does not seem slow. My PC is a Lenovo Thinkpad with Windows 8.1 (I'm suspecting this could even be bundled with Lenovo??) I have avast installed and did a malwarebites scan but came up with nothing. Any advice would be greatly appreciated. Thank you
