"DCOM got error "Class not registered" from the computer user when attempting to activate the server"

I received this error message every 1 second in may server 2000 event log. How I can solve this problem? What is the hardware or software require?

It looks like the server is trying to start a program or perform an action, but the action or program doesn't exist. Do you have any software you uninstalled recently, that might still be trying to run?

Do you have access control for your server?