Troj/Optix-03C is a backdoor Trojan which will run in the background as a server process, allowing a remote user (using a client program) to gain access and control over the computer.
When first run, it creates the sub-directory <Windows>\OleFiles\, moves itself there and creates the registry entry
HKLM\Software\Microsoft\Windows\CurrentVersion\explorer\
User Shell Folders\ Common Startup = <Windows>\OleFiles\<Trojan name>
This ensures that the server process is run automatically each time the computer is restarted.