Norton is installing a Cryptocurrency miner called Norton Crypto (NCrypt.exe)
At this point I'm convinced that the entire antivirus industry is a scam scheme for the most part. They make everyone suffer for their own profit.Users are scared into installing this crap and paying recurring payments for it, and then the performance of their computer goes to shit. Developers are given nightmares by having their software misdetected as a virus or broken by the antivirus changing the OS behavior in unexpected ways.