I feel like someone is watching me.

Said I had a problem with my computer that could damage it. Talked with him at length at about how these sort of phone calls could frighten vulnerable people, that I'd sort my computer out myself if it was presenting problems and that I thought his company just wanted to make money out of me in some way. He eventually hung up on me.

I was thinking all robo calls were illegal now.

It seems that various phone numbers from the same area code (516) are used.