TROJ_AGENT.ABS and NAIL.EXE

Hi, i have done everything that it said in this site but it appeared the nail.exe as F2 in my log file. I installed Adware, spybot, and others but i dont know whats is the problem.
I did with the nail.exe this: cmd. nail.exe /fullremove but the file didnt remove.
And appearead when i put control alt delete a lot of vchost files is it wrong??

sorry but i dont write very well ...but i hope that understand me..

 

Click Start > Run > type in regedit

Navigate to the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell

Delete the value, Nail.exe and exit Registry Editor

NEXT:
Click Start > Run > type in cmd

Type in the following:
Nail.exe /FullRemove

Now, boot into Safe Mode and delete the file nail.exe


After you do the above, reboot back into normal mode and attach a fresh HJT log.