need password to delete old product

Am updating daughters computer    Win XP  OS    Have a program listed in start menu as Symantic Client Security  with submenu Symantic Antivirus .  The program version is 10.1.4.4000 and probably installed around 2004

 

Tried to use Install/remove programs from control panel   and got a pop up window  Please Enter the Uninstall Password

 

Have no idea what it is.    Any suggestions???????