c:/windows/system32/cmd.exe

hi guys. i dont know anything about computers but my laptop was running slow so i tried to run malwarebytes. it was shut down and i get a error message everytime i try to reopen and now on start up i have a black box that says c:/windows/system32/cmd.exe and over 3000 processes are running with cpu at 100%. i tried to kill processes but my system just shuts down when i try to boot in safe mode it shuts down also. most of the processes are Peyter marlon.scr Emery.exe mattheus merrell.exe and attrib.exe please help! thank you.