Svchost.exe is a process that hosts other Services to perform various functions. There can be multiple instances of svchost.exe running on your computer, with each instance containing different services. In Windows 2000/XP, you need Tasklist or Process Explorer to view the list of Services running under a particular svchost.exe process. This is much easier in Windows Vista and Windows 7, wherein you can view the Services list using Task Manager.
Open Task Manager by right-clicking the taskbar and then clicking Task Manager.
Select the Processes tab
Click Show processes from all users. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Right-click on a svchost.exe process and click Go to Service(s)
This highlights services which are hosted by the svchost.exe process which you right-clicked on.