Removing Window XP's Messenger
 

If Window XP's Messenger is not being any use to you, you can just get rid of it. And you can do it with ease. First, you have to open your %system% folder. The %system% is a variable, it can be 'C:\Windows' or 'E:\Winzip', you get the point. Now, open the INF folder and locate the file sysoc.inf. Make sure you make a back up of the said file before proceeding. Open the file after securing a backup, hold down 'Ctrl' key and press 'F'. Type in the line "msgmsgs" and then by the end of the line containing it, you will find a word 'hide' (which is not hidden as a matter of fact). Delete the word 'hide' and save the changes you made to the file. So now, close the file and go to the Add/Remove Programs in the Control Panel. Look for the 'Windows Messenger' in the populated list of programs and click 'Remove'. Confirm uninstalling 'Windows Messenger'. Wait until the uninstallation is successful.

there is a much easier way than modifying your windows files.
Simply go to the folder under Windows/Program Files and delete all .dll files and rename the .exe (you cannot remove it)
This will allow you to completely remove the folder after your next restart.

For the average user this is much safer.

I Can't Find The File Need
 

Sir,
The information that given by you is not necessory it's too difficult for finding the folder you specifiedplease tell me the short way

It's very easy.

Rename the file msmgs.exe
(Normally in c:\program files\messanger\ folder) to some other name.

That's all.