Lately, my computer's speed got significantly reduced during start up and on my dad's account he wasn't able to get far using IE because an error kept showing up, then he was redirected to OneCare on the internet instead to do a scan. The scan took too long and it wasn't making much progress. I remember it indicating there were 7 items infected and 1 issue found. The full system scans that I kept conducting using Norton Internet Security couldn't find any threats on my computer when I was logged in my dad's account but normally on my personal account it shows some tracking cookies and other things. & that's what was revealed in the full sys. scan on my account. Strange, why couldn't the other scan on my dad's account reveal that? I then used Malwarebytes' Antivirus Program to discover that actually 2 registry keys and 1 file is infected. I have a Trojan.Agent and 2 Security.Hijack s - C:\Program Files\Norton Internet Security\Engine\188.8.131.52\msl.dll (Trojan.Agent) - HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\egui.exe (Security.Hijack) - HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ekrn.exe (Security.Hijack) Even when I delete these on reboot, they won't disappear after the next scan. I'm not sure how I should approach this clean up. I was talking to a Norton representative and they recommended me to use their paid service by having an expert remove the viruses but my dad won't allow it. My friend recommended me to use ESET NOD32 Antivirus = useless. couldn't detect any threats. I don't know how to remove these threats, pinpoint the infected registry keys and file without doing corrupt damage to my computer. Can someone please assist through the process?