My Vista Ultimate Programs > Accessories > System Tools > Disk Defragmenter has stopped working. I hadn't used it for about two months because it showed my HDD wasn't fragged that much so I don't know what might have caused it.

Now when I click Disk Defragmenter the UAC window prompts me to "Continue" and then nothing happens.

I also tried to "run as admin..." but same result.

Suggestions?

Thanks,

Kerry