If I understand the comment about computer problems and the person has an ascent like from India . yes it is a scam. They have been doing this for years now. Also being on the Do Not Call List is really not of any use. I have heard many people say this but to put in a complaint is useless. This is what I found on the Google search
The number is currently on switch number SMFRCTATW51 (switch is a technical specification for phone hobbyists) .
Read more at http://www.whycall.me/203-683-5767.html#bIAgo5JigiwrKWDQ.99