Thier is a mmc upgrade for xp at microsoft downloads.As for defrag,try
kb922379 Also,youre better off running defrag in cmd,Type

efrag C:
"jamesd" wrote:
> When I try to open Disk Defragmenter I get (mmc.exe - Application Error) the
> application failed to intialize properly (0xc0000033). click on OK to
> terminate application. Any way to fix this?