The long and short of it, the Indian scammer ends up setting a SysKey password and a bios password on his machine. He's using his bosses' machine, and it appears to be the domain controller.
The scammer ends up crying and screaming at the guy and out of terror and rage, ends up hanging up.
Normally, I would be like "I feel bad for this guy". Nope not at all. Bloody scammer got what he deserved - a taste of his own medicine.