Nah - if he was using internet explorer it’s possible to get a server installed on your PC through infected ads. (Though you generally have to be going to questionable websites to get that level of infection to begin with)
Once the server is there they can order your PC to pull down whatever they want.
Or open WiFi.
But you’d think a Nobel peace prize perfessor would have better smarts.
Krugman won the Noble Prize for economics, not the Peace Prize.