Indian Windows scam

Recently I have received three calls  from Indian gentlemen who tell me they work for Windows (not Microsoft, Windows) and they have found something wrong with my computer which they can fix, but they want me to co-operate by giving them my IP address, I suppose so they can go poking about in my laptop for all my details. I am not such an idiot as to co-operate. I am sorry for the elderly people who aren't so savvy and do get caught this way. I have found the quickest response is to say, "I have an Apple Mac". "Goodbye Mam" they say, sounding very tired, and then I feel sorry for the Indians who do this job and sound so defeated and are, I suppose, demoralised.