>It's not Task Manager. It's another network admin tool where I can see all process and files opened by all users.
>I don't remember the name of that tools. It's for Windows XP. Someone can help please ?

As Boris suggested, the sysinternals has a process viewer. It is much better than using task manager. TM will show svchost running in the processes, where sysinternals process viewer will show all the processes that are being wrapped in the svchost process.