You have posted different .exe names for the process, the one in the
subject line refers to MSN Messenger but the one in the body refers to a
virus. I take it it's just a typo.
I guess no one would want msmsg.exe running...
"msmsg.exe is a process which is registered as the Backdoor.Prorat.10b3
Trojan. This Trojan allows attackers to access your computer, stealing
passwords and personal data. It is a registered security risk and should
be removed immediately."
As for MSMSGS.exe (MSN Messenger) go in the Control Panel Add/Remove
Programs and uninstall it.
John
PS. MSMSGS.exe could also be a virus, but don't panic for nothing, you
probably don't have a virus, just for your information.
John