Windows XP A to Z - http://www.softwaretipsandtricks.com/windowsxp
Reinstall MS Messenger
http://www.softwaretipsandtricks.com/windowsxp/articles/401/1/Reinstall-MS-Messenger
Super Admin
 
By Super Admin
Published on 02/25/2005
 
Reinstall MS Messenger

Reinstall MS Messenger

NOTE: You must be logged on as Administrator or as a member of the Administrators group in order to perform this procedure.

Click Start , click Run , and then type the following command:
%systemroot%\inf

NOTE : There are no spaces at all in the preceding command line.

Click OK to open the INF folder.
Locate the file MSMsgs.inf .
Right-click the file, and then click Install . This will reinstall the files that Outlook Express needs to proceed normally.

It will ask you to put your windows XP cd in the drive