I can't get defrag to run

[Guest martin.m.l]

I have had problems trying to defrag C: drive and have found a site that was

a help,

 

http://www.winhelponline.com/articles/60/1/How-to-fix-Disk-Defragmenter-problems-in-Windows-XP.html.

I was getting messages defrag not installed on your computer and I used this

and got back disk defrag but it still will not work can any one help me?

I have windows XP pro with sp3

 

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mml