This has been going on in Canada for a few years now. There are a 1/2 dozen companies or more in India which are aggressively using telemarketing to scam people out of money. One of these companies actually DID provide tech support for Microsoft at one point, which lost their contracts and began scamming.
They get people to look at various places in the Windows OS and reporting features and trick them into thinking errors/viruses are being shown. They also call themselves "Windows Support", specifically not "Microsoft".
CBC news here has done 2 full 2 hour specials on this - they infiltrated a guy into one of the call centers in India, it was pretty interesting actually. You HAD to sell someone on day one or you get fired, hence the very aggressive tactics and lies. All they want is your credit card # really.
They've saturated the Canadian market, you can't speak to anyone without a home phone line without them bringing this up, I've been called over 20 times on our 2 landlines. Lots of youtube videos of IT people screwing with them, one of them actually hacked the Indian call center back, and took control of THEIR pc, I'll find it and link it, pretty funny stuff.