Hi it's spazza68 again, I eventually managed to find a trojan downloader when I unistalled my antivirus then installed avg 8.0 and scanning it in safe mode. It was from a corrupted song download. I have removed it but it's too late it still shuts down. It seems to be there whenever the computer is started up. Can anyone tell me what i should be looking for coz it looks like it's diguised itself as legite.