Firstly when I start nod32 application a message appear "trojan Win32/Rootkit.Vanti.E found in operating memory. The file can be deleted. It is strongly recommended that you back up any crucial data before you proceed. No action can be taken while the file is in memory. Click "Leave" to continue and subsequently run the cleaning of all local disks. System memory infection originated from file C:\WINDOWS\system32\a57ylmq.dll." Then I click leave and restart my pc.However after restarting,i launch nod32 again and the same message appear.Then I restart and go to safe mode. I scan all my hard drive.After restarting again the same message appear.How to clean this worm actually? I set my nod control center to 1st action is clean and 2nd action is delete for all files,runtime packers etc. Please help me.