defragmentation apps

[NETPDCT]

I get the following error when trying to Defrag on my
Windows 2000 pc:

MMC error: Snap-in failed to initialize. Name: -not
available- CLSID: {43668E21-2636-11D1-A1CE-0080C88593A5}

I have used alot of different defragmentation apps and one
of them probably caused the problem(each was uninstalled
correctly).

I already know this but does anyone know how to restore my
Windows defrag to it's original state without adding/using
a Windows 2000 Pro CD?

 

[Rich]

dfrg.msc is the file that is corrupted. If you give me
your email I can send you that file you are missing. If
you still have it you will need to replace the original
dfrg.msc with the new one. My email is:
(e-mail address removed)

Rich