Recently, one of our server was completed with inplace upgrade from Windows 2000 to 2003. After the upgrade, when you right-click My Computer icon in the Desktop and choose Properties, the Remote tab was missing. Because of this I was unable to configure remote desktop settings and this was fixed by registering the DLL file using the below command.
If you receive an error stating that the module could not be found, or stating no registration helper is registered for this file type (which indicates a corrupt DLL), extracting a new copy from the installation CD should help.
To extract the DLL from Windows the installation CD, type this in Command Prompt
EXPAND X:\I386\REMOTEPG.DL_ -R C:\WINDOWS\SYSTEM32
Note: considering X is you CD ROM and C as your Windows drive.