BTW, the call itself was from caller id 210-301-0307, which has a long history of obnoxious behavior. the 210-807-3421 number is what they requested we call back.
we got a call from this number, saying someone had hacked into the ip address; got access to the computer and said to call a cyber securities company who could fix the problems. it appears that this number and the cyber securities.us company are working in tandem to download infected files and then charge $500 to fix it. definitely a scam.