Bitcoin miner virus can't be deleted even with factory reset

My Toshiba Satellite was infected with a virus one day when I noticed my CPU usage was really high every time I opened task manager and my CPU immediately went up to 100% CPU. I searched up on the internet thinking it was a bug but I read many forums and people have claimed it is not a bug. most people stated Hackers have found a way to take control of other computers and use them as bitcoin mining and send the data back to the hacker. This is really slowing down my Laptop. I have tried many antivirus programs, Even Malwarebytes but none of them have worked. I also tried resetting everything on my laptop back to factory settings deleted every program but the virus stayed. Even when I boot into safe mode the virus is there also. If I turn off all my antivirus protection the Virus takes over my computer and i can't open task manager and all my programs will stop working but I can still use browsers. The Virus may also be a Worm because 2 days after my laptop got infected it also infected my other PC. I think it was passed from my emails cause both of the computers were logged into the same email. Please help this problem is really getting harder for me I am out of Options Thank You!.