Cannot Access Add/Remove Components in Windows XP (a solution)

Problem :
I get an error message: "Setup was unable to open information file netoc.inf. Contact your system administrator."
I am the system admin.
Solution :
1. Insert the Windows XP CD2. Go to Start>> Run. Type in: Expand C:\i386\NETOC.IN_ -rC:\Windows\Inf [Enter]
Note: C:\ is used if that is where Windows XP is installed.