Boot Time Defrag with Defraggler

Defraggler has a Boot-Time Defrag option which allows you to defrag files that are normally locked by the Operating System before the operating system is fully loaded.


To enable Boot-Time defrag:

    1. In Defraggler’s main menu, click Settings, and then click Boot Time Defrag.
    2. You can select the following run options:
      • Disabled – disable this option
      • Run Once – defrags files during boot time only once
      • Run Every Time – defrags files during boot time every time you start your PC
    3. When you enable this option a dialog box will be displayed to inform you that this option has been switched on and ask you whether you would like to reboot your PC now. If you choose Yes, your PC will be rebooted and defragged. If you choose No, your PC will be defragged upon the next reboot.


At the moment following files are defragmented during the boot time defrag:

  • C:\pagefile.sys
  • C:\WINDOWS\system32\config\AppEvent.Evt
  • C:\WINDOWS\system32\config\default
  • C:\WINDOWS\system32\config\SAM
  • C:\WINDOWS\system32\config\SecEvent.Evt
  • C:\WINDOWS\system32\config\SECURITY
  • C:\WINDOWS\system32\config\software
  • C:\WINDOWS\system32\config\SysEvent.Evt
  • C:\WINDOWS\system32\config\system

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