Oct 6, 2009
I have Windows Vista.
I went into safety mode and tried to run disk defragmenter, but nothing happened. I would right click and press open, but it acts as if I did not do anything. Nothing happens.
Have you tried runing in normal mode;
Can you run if you right click and select "run as Admin"
How much free space do you have on the drive. I believe defrag needs a min of 16% free space ( but I believe it should run but give a message - "not enough free space"

Have you tried going to the directory and select the dot exe program ( Link may have been broken).