Standard issue Indian computer scammers. Wanted me to press <win><ctrl>R.
Told them I did so and my screen turned green. When I demanded to know what they had done to my computer, they told me to run away from the computer and hung up!
Same thing, "Hello, my name is Rafa, is this the owner of the computer? I am calling about your service request." The call is coming from Spain, country code 34, local number 70-436-764x (last digit not showing up on a US phone). City codes in Spain begin with a 9, so it's probably a toll-free, wireless of spoofed number. In any event, it's a phishing scam of some sort.