Is the file %SysDir%\HFDTLUKT21.DLL located on your computer? Then your computer is infected.
We highly recommend you to remove %SysDir%\HFDTLUKT21.DLL from your computer as soon as possible.
%SysDir%\HFDTLUKT21.DLL is Trojan/Backdoor.
Kill the process %SysDir%\HFDTLUKT21.DLL and remove %SysDir%\HFDTLUKT21.DLL from the Windows startup.

%SysDir%\HFDTLUKT21.DLL Information and Removal:
HFDTLUKT21.DLL is known as: Trojan-GameThief.Win32.Taworm [Ikarus] packed with ASPack [Kaspersky Lab].
MD5 of HFDTLUKT21.DLL = FC03993FE42724A0E5769545DFAD881F
HFDTLUKT21.DLL size is 103936 bytes.
Full path on a computer: %SYSTEM%\HFDTLUKT21.DLL
Related Files:
%SYSTEM%\HFDTLUKT.EXE
%SYSTEM%\HFDTLUKT11.DLL
%SYSTEM%\HFDTLUKT21.DLL