This file is a harmful and undesirable program. Probably virus. It's recommended to delete it.
What is smsss.exe Windows startup process
File name: smsss.exe
Program name: SMSSS
Description: SDBOT.ZD WORM
Information added by: Joni at 09 October 2008
Hint: If smsss.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 smsss.exe is SMSSS. Some of them are viruses, so you should use a antivirus program.