Blue Screen and DPC Watchdog Violation

Yesterday I started getting this Blue Screen and DPC Watchdog Violation. what does it mean and how do I fix it! I also have this allowing Hotspot Sheild thing that keeps coming up on my internet! I am wondering if I have a virus! I have norton antivirus installed.

Can you advise me what to do!?

I have norton antivirus installed.
does it mean you have avast and Norton installed ?

running multiple AV will give you a slow machine, Windows errors and false detections