Trojan Virus

I have both  Trojan Powerlik activity,   Trojan Ad Click Activity,   Angler Exploit Kit  Website 12   and I keep getting High Memory usage   CPU usage.   I ran a complete scan and even did power eraser and it didn't clean it up.     I am computer illiterate so please bear with me.   I hope someone can help me to get rid of these virus's     Thank you