This file is a harmful and undesirable program. Probably virus. It's recommended to delete it.
What is msacm.exe Windows startup process
File name: msacm.exe
Program name: MSACM
Description: OPASERV-O WORM
Information added by: Sparx at 08 August 2008
Hint: If msacm.exe 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 msacm.exe is MSACM. Some of them are viruses, so you should use a antivirus program.