Got a backdoor trojan, w32myzor.fk@yf(i think). That got past a free edition of AVG i had installed on my pc. After knowing i had the trojan and AVG couldn't prevent it, I installed PC - Cillin which has not resolved the problem. The trojan keeps opening internet explorer with various different sites for spyware/malware removal, asking you to buy them. Also the trojan slows down my pc drastically almost to a freeze. It has contaminated windows media player. I have tried microsoft windows defender, adaware by lavasoft and spybot search + destroy which the trojan prevents from even opening. Can anyone help?