I wore many hats in IT for a major Federal agency justly renowned for its technological prowess. I was a Unix system administrator and network administrator, and data communications, later Internet services, administrator, and IT security administrator, for many years spanning the decde or so preceding the birth of the Internet until my retirement by which time it was ubiquitous in every home. I get these phone calls from "Microsoft Technical Support" all the time. It is always some guy with an Asian accent.
Sometimes, when I have time on my hands to kill (a frequent occurrence in retirement) I have some fun playing with these guys. I express alarm and tell them to wait a moment while I go up to my office and power up my machine, which I pretend is old and underpowered and therefore takes long minutes to boot (it is old but it is NOT underpowered and in real life it boots up from SSD in only a few seconds). I make him wait and ask him questions, like what is the nature of the malware that has infected me and how did they discover the breach.
After I have wasted a good amount of his time I inform him that I actually have several computers and I am not sure this one is the one that he is referring to. I ask him to tell me the name on the Microsoft account or, failing that (and he never knows that), the IP address of the infected machine. He will usually presume I do not know my IP address so he will often start the dotted decimal with "192.168...") which for many years was the almost universal default for home routers (mine are different, of course -- I know how to configure a router!).
I keep him on the phone with various other ruses until I get bored with it and then I tell him that I know what he is doing. It is really quite amusing to listen to his subsequent tirade, which can often be quite vicious, profane and threatening.
But while I've tied him up, he cannot try his ruse on anybody else, who might actually think that Microsoft calls people on the phone out of the blue for any reason whatsoever ever. They don't, and they never will.