This file is a harmful and undesirable program. Probably virus. It's recommended to delete it.
What is RunDll32 Windows startup process
File name: RunDll32
Program name: MMSystem
Description: FUNNER-A WORM
Information added by: Maglor at 30 April 2008
Hint: If rundll32 file is a virus or trojan, we recommend to use a antivirus software or registry cleaner.
We are presenting list of Windows processes, startup files.
Name of RunDll32 is MMSystem. Some of them are viruses, so you should use a antivirus program.