First there was music. Then a heavily accented voice from a call centre in India. This minion's job was to get me to turn on my PC so they could achieve something.  So, three mistakes there:

I don't have a PC that I use for anything except specialist purposes
This was a silent call, music notwithstanding. If they had been a Australian company this would have been illegal
I am not the idiot they think I am
This call is just like those guys who turn up in an old Ford Transit with a load old asphalt on the back and ask if you want your drive resurfaced, and then rip you off rotten by doing a bad job.  You do not give access to your PC with your personal data, your bank details, on it to any old Tom, Dick or Harry. Instead you take up references.