Error "8505,104" and "trojan.maljava"

Hi
Three days ago Norton Internet Security 2012 detected a "trojan.maljava" in one of my computers. Norton made the normal procedure and said that everything was ok, that the virus was deleted, etc. After a while Norton stopped working and recognized the malfunction as the error "8505,104" appeared. I tried all the suggestions, like the Norton Power Eraser tool (I downloaded as suggested and the tool just simple doesn't open), I installed and reinstalled Norton and the error just shows up again.
Can you someone help me?

 

I run a Packard Bell with Windows 7 Home Premium 64-bit SP1

Intel Core2 Quad CPU Q9400 @ 2.66GHz, 8,0 GB RAM

Hi
Three days ago Norton Internet Security 2012 detected a "trojan.maljava" in one of my computers. Norton made the normal procedure and said that everything was ok, that the virus was deleted, etc. After a while Norton stopped working and recognized the malfunction as the error "8505,104" appeared. I tried all the suggestions, like the Norton Power Eraser tool (I downloaded as suggested and the tool just simple doesn't open), I installed and reinstalled Norton and the error just shows up again.
Can you someone help me?

 

I run a Packard Bell with Windows 7 Home Premium 64-bit SP1

Intel Core2 Quad CPU Q9400 @ 2.66GHz, 8,0 GB RAM