The good thing about Trojan Horses: It’s not that difficult to remove them. But the bad thing is that Trojan Viruses are quite difficult to find. Although they will not corrupt files or delete things on your hard disk, using them allows hackers to detect your credit card number, your social security number or some other private data. And of course, this is 1000 times worse.
The problem about deleting Trojan Horses is that since they have a variety of forms, there is no single method to delete them. Normally, using some antivirus software will help detecting and removing the Trojan Horses hiding on your hard disk. You can also try to clear the temporary internet files and delete them manually. Otherwise try this:
1) Open the System Information Utility (msinfo32.exe). You will find it at:
C:\program files\common\microsoft shared\msinfo. This program shows you all the processes running on any windows system, even those that are hidden from the task list that you normally use to look up the running processes on your PC. Now look for task listings which you do not recognize. Check the filenames and paths. Open your virus scanner and run the executable or .dll through it.
2) Open your antivirus software (If you don’t have one, download AVG Anti-Virus Free Edition 7.5. It’s pretty good and free). Run a virus scan. After the scan delete the value that was detected from the registry (first back up the registry!):
A) Click “Start > Run  B) Type “regedit  C) Click “OK  D) Go to the subkey: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services E) Now delete any value in the right pane that was detected during the scan F) Exit the Registry Editor
3) If the steps 1) and 2) didn’t help, download the free Trojan Horse remover HijackThis. It’s one of the best Trojan Horse removing tools out there.
If you still have problems with Trojan Horses, take a look at:
http://www.ultimatetrojanremover.com
P.S. This may also help: Restart your computer with your Boot-CD and run an antivirus program.
> Antivirus Software 
