ddhelp - ddhelp.exe
ddhelp.exe (ddhelp stands for DirectDraw Helper) is a Windows NT/2000/XP generic process which is an integral part of DirectX, used for displaying graphics.
The file that corresponds to this process is normally found in the directory "%SystemRoot%\system32\Ddhelp.exe" (where %systemroot% is usually C:\WINDOWS by default).
The process ddhelp is not in any way a virus, a worm, a Trojan horse, spyware, or adware.
It is a system process which can be terminated.