Task manager not opening

[Mazen]

I have Win XP home edition on one of my PCs at home, and when i hit Ctrl+Alt+Del to enter the Taskmanager it gives me an error message saying that the access can't be done " i have to contact my network administrator!" any help on that? thanks

[Reshin]

Try these

http://support.microsoft.com/kb/555480/en-us
http://support.microsoft.com/kb/913623/en-us