Keep getting the Yontoo.C virus on Dell Optiplex 7010 running Symantec Endpoint Protection Version 12.1.4013.4013 doesnt discover it until reboot. Symptoms: Once infected CPU usage jumps to almost 100% and stays there until the reboot. Why will Norton not catch and contain this until the reboot? I have updated definitions several times. It is annoying to have to reboot mid day since everything I am working on must be shut down and reopened which eats up 1-2 hrs of my day the last two infections. Please Help!!