Fix Disk Defragmenter (dfrgui.exe) Does Not Launch in Windows 7

When you start Disk Defragmenter using any of these ways in Windows 7, nothing may happen except a brief blue circle (hourglass):

  • Right-click on a hard disk drive-letter, click Properties, and click Defragment now… from the Tools tab.
  • Access Disk Defragmenter from the Start menu shortcut or Search results.
  • Run Dfrgui.exe from the Windows\System32 directory.

This happens if the Disk Defragmenter service isn’t turned on. To enable the service, use these steps:

Login to a user account with administrative privileges

1. Click Start, type Services.msc and press {ENTER}

2. Double-click Disk Defragmenter service from the list

3. Set the Start type to Manual

4. Click OK.

Try launching Disk Defragmenter now.

About the author

Ramesh Srinivasan founded Winhelponline.com back in 2005. He is passionate about Microsoft technologies and has a vast experience in the ITeS industry — delivering support for Microsoft's consumer products. He has been a Microsoft MVP [2003 to 2012] who contributes to various Windows support forums.

1 thought on “Fix Disk Defragmenter (dfrgui.exe) Does Not Launch in Windows 7

  1. I installed windows 10. Hated it. Downgraded back to 7 via security features and now dfrgui no longer works. Tried your suggestion but it still did not work. Please help.

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