Run online scan using Kaspersky or ESET or A-squared online scanner:
See if any of these online scanner will detect and remove the said trojan horse from your computer.

If the problem continue, do this:
Get HijackThis from
Create a folder in your desktop and save Hijackthis.exe on this new folder.

Open Hijackthis.exe, click "Do a system scan and save a logfile"
After the scan is finished, the notepad will open to display the log.
Copy the entire log information from the notepad to one (1) of the forums below:


Let them diagnose or analyze your log file. Close HijackThis window (do not fix anything unless you receive instruction from the HJT analysts)