Xp task manager problem

[ashok_inder]

i use xp sp2
in my task manager under user name nothing is displayed
i want to know which task is running by which user or it a system task..
it disappeared after i disabled some services and now i don't know which service is the possible cause for this...i have no virus or spyware in my system...
any how can i get user name in my task manager..
i don't need 3rd party task manger as i am satisfied with the default task manager

[Pratul_09]

This may help

1> Click Start, Run and type Services.msc or goto ctrl-panel-->administrative tools-->services
2> Locate by name Terminal Services and double-click it
3> Set the Startup type to Automatic, and click Apply
4> Click the Start button to launch the service manually, if not started automatically.
5> Now Task Manager User Name field will show details.