I have Avast Movile Security on my android device for a long time, but last week when i was reeding an articule on Flipboard Avast detected a trojan called: Android Agent-CBU (Trj) in my launcher application, i tried to delete it but its impossible; i restored the factory settings but the virus's alert came back after 2 minutes without installing any other aplication than avast.
Could it be a false positive case?