Windows 95 Defrag.exe Command-Line Parameters

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This article lists the command-line parameters for the Disk Defragmenter tool (Defrag.exe) in Windows 95.

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You can use the following command-line parameters with Defrag.exe, either on the Open line in the Run dialog box or within System Agent:
   /ALL          Defragment all local, non-removable drives.

   /F            Defragment files and free space.

   /U            Defragment files only.

   /Q            Defragment free space only.

   /P            System and hidden files will be optimized.

   /CONCISE      Display the Hide Details view (Default).

   /DETAILED     Display the Show Details view.

   /NOPROMPT     Unattended mode; do not stop and display confirmation

   /PMIOCTL      Turns off use of the protected-mode IOCTL from

   /SAGESET:n    Display the System Agent-Aware Setting dialog box and
                 store the settings in the SETn registry key.

   /SAGERUN:n    Runs in unattended mode using the System Agent-aware
                 settings in the SETn registry key.
The following switches are valid in MS-DOS version 6.x, but are not valid in Windows 95. If you use these switches, they are ignored and no error message is generated:


Article ID: 155326 - Last Review: October 26, 2013 - Revision: 2.0
Applies to
  • Microsoft Windows 95
  • Microsoft Plus! 95 Standard Edition
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