i think there's a bitcoin miner virus on my pc

[ghost cat]

i really need help guys ! whenever i connect my pc to the internet the gpu usage goes to 100% and stays there until i disconnect from the internet ! i dont want my graphic card to fry out as the temperatures go upto 85 degrees celsius ( even while im just staring on the desktop and no gaming ) these are my system specs and i just upgraded to windows ten if that helps ! if anyone could tell me how to find it and remove it that would be awesome also if it could be another issue do advise. i have malwarebytes anti malware installed and that finds nothing !

core i5 3470
4gb ram
gigabyte R7 260x 2gb
550 watt corsair power supply
windows 10 pro (genuine)

 

[georgehh]

Ctrl + Alt + Delete, Task Manager, More Details, Processes. What comes up?