The reason you are seeing
“Malicious Pornographic Spyware/Riskware Detected” virus adverts is because of an adware infection. These scam ads will try to to make you call con artists pretending to be technical support so that they can sell you pointless tools or get access to your OS remotely. If an adware is indeed to blame, expect adverts to be quite intrusive. If you negligently install free software, it isn't surprising you picked up an ad-supported software. Just to be clear, the advertisements won't harm your computer so as long as you do not dial the number, no damage will be done. However, if you did call them, you could be scammed out of a lot of money, or more severe damaging software might be installed, and that may lead to stolen personal data. Authorizing some suspicious technicians remote access to your OS could turn out badly, so you should be careful. And if you are still concerned about the advert you are getting, it is false, and neither your OS nor your data is in danger. If you want the alerts to go away, you must eliminate “Malicious Pornographic Spyware/Riskware Detected” virus.
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