Disk Defragmenter does not open in Win Vista Ultimate.

When I click on open it just flashes and disappeared. I can find the icon however

When you right-click on the shortcut and look at the properties, the target area say % SystemRoot%\system32\dfrgui.exe?

Can you find the target (dfrgui.exe) and click on that and get to open the defragmentation?

What is a right click on the drive icon / properties / tools / defragment now has open Defrag?

See if the fix for the file associations for .lnk (LNK) files help?

For Windows Vista file association problems
http://www.Winhelponline.com/articles/105/1/file-association-fixes-for-Windows-Vista.html

Have you tried another user to see if they have the same problem?

How to repair the operating system and how to restore the configuration of the operating system to an earlier point in time in Windows Vista
http://support.Microsoft.com/kb/936212/#appliesTo

Tags: Windows

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