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  1. #1
    Star Lounger Steve1209's Avatar
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    Windows 10 Disk Defragmenter question

    Hi All,

    Is there a way to change the TIME that windows 10 disk defragmenter runs? I know you can set daily or weekly etc. but I'd like it to run at like 3AM in the morning when my computer is up doing nothing.

    Thanks for any help!

  2. #2
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    There may be a way you can do it in Task Scheduler but you'd need advice from someone who is used to using that.

    However, you can run it manually say when you go for a meal break by opening a Command Prompt (Admin) and enter defrag /c which will defrag all volumes - although it hasn't managed to get the System one down from 25% Fragmented on one of my laptops.

    If you enter defrag you will see all of the switches you can use.

  3. #3
    Silver Lounger
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    I've noticed the defrag won't always run on partitions that don't have a drive letter assigned.

  4. #4
    WS Lounge VIP Coochin's Avatar
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    Go to Control Panel\Security and Maintenance then click on "Maintenance" to expand the drop-down list. In the "Automatic Maintenance" section click on "Change maintenance settings" then adjust the "Run maintenance tasks daily at" setting to your liking.

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    Computer Consultant/Technician since 1998 (first PC was Atari 1040STE in 1988).
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  5. The Following 4 Users Say Thank You to Coochin For This Useful Post:

    BATcher (2016-11-08),lumpy95 (2016-11-07),Steve1209 (2016-11-07),Sudo15 (2016-11-07)

  6. #5
    Super Moderator BATcher's Avatar
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    Coochin's answer is excellent because inspection of the Defrag task in Task Scheduler shows that the task has no trigger time.
    My last run time was 04/11/2016 [dd/mm/yyyy) at 14:08:51.
    BATcher

    "The trouble with quotes on the internet is that you can never know if they are genuine."
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  7. #6
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    Quote Originally Posted by BATcher View Post
    Coochin's answer is excellent because inspection of the Defrag task in Task Scheduler shows that the task has no trigger time.
    My last run time was 04/11/2016 [dd/mm/yyyy) at 14:08:51.
    I couldn't find a Trigger either which is why I suggested that perhaps someone else should look at that aspect.

    I've never bothered with the Defrag Schedule as I only use laptops which are switched off when I'm done and I just check the HDD state once a month and then manually defrag if necessary.

  8. #7
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    Or . . . don't run it on a schedule at all !

    In general, NTFS can cope with hundreds of fragments per file before you get a measurable performance hit and running defrag daily is just wearing out your HDD (specifically the head actuators).

    Maybe monthly, at most ?

  9. #8
    Super Moderator Rick Corbett's Avatar
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    Quote Originally Posted by MartinM
    Maybe monthly, at most ?
    Ed Bott, in Windows 10 tip: Defrag secrets for hard disks and SSDs, writes:
    But manual intervention isn't really necessary, because the appropriate drive optimization is scheduled to happen weekly.

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    cmptrgy (2016-11-08)

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