If your computer has been infected by the Trojan:DOS/Alureon.A, you had better remove it form your computer immediately. Trojan:DOS/Alureon.A is produced by certain variants of the Win32/Alureon rootkit which may cause enough damage to make the infected computer unstable. Trojan:DOS/Alureon.A is designed to steal data by intercepting Internet traffic and extract information from it. It can be installed on your computer without your permission. Don’t be surprised why your computer is infected. Once installed on the computer, it will change the registry key entries first to add itself into the startup. It always monitor all your actions by running in the background secretly.

Most of the victims have no idea about how to remove the Trojan:DOS/Alureon.A completely and safely. Any manual deleting mistake would crash your PC system therfore, you should be quite familiar with the Windows system and eliminate it very carefully. YooSecurity is the most famous PC online tech support and today we invite one of the experts of them to introduce you how to remove Trojan:DOS/Alureon.A step by step.

Step 1: Press Ctrl+Alt+Del keys together and stop all processes related to Trojan:DOS/Alureon.A in the Windows Task Manager.

Step 2: Delete the files of Trojan:DOS/Alureon.A

C:\WINDOWS\Installer\Random
C:\WINDOWS\system32\services.exe (Random)
C:\docume~1\LOCALS~1\Temp\random.sys
C:\windows\system32\drivers\random.sys

Step 3: Clean up the Registry Entries That Generated By The Alureon.A Virus

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce\
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\random thing
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce\*

You also can learn more removal tips from the Yahoo Answer: How to Remove the Trojan:DOS/Alureon.A