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Disk Defragmenter

General Information

None at this time

Windows 7

Default Description

Provides Disk Defragmentation Capabilities.

Additional Information

New to Windows 7, this service is now used to defragment disks on a schedule. It will start and stop automatically and is not started at boot time. If you decide to disable this service (you use a different defragmenting application or use SSD), you should also disable or delete the scheduled task:

Head to Start -> Control Panel -> System and Security -> Administrator Tools -> Task Scheduler

Left hand column: Task Scheduler Library -> Microsoft -> Windows -> Defrag -> Right Click ScheduleDefrag (under Name-Status-Triggers) and select Disable (what I would recommend doing) or “Delete” (not a good idea if you wish to restore this scheduled task later).

It has been reported via email that the Disk Defragmenter service is required if you want to shrink a partition. In that case, they had a whole-drive C partition that they wanted to shrink to create a D partition, and it wouldn’t work until they turned Disk Defragmenter back on. Scheduled task, not required.

Default Startup Type

Windows 7 Starter Manual Manual
Windows 7 Home Basic Manual Manual
Windows 7 Home Premium Manual Manual
Windows 7 Professional Manual Manual
Windows 7 Ultimate Manual Manual
Windows 7 Enterprise Manual Manual

Service Names

Service Name (registry): defragsvc
Display Name: Disk Defragmenter

Default Path and Command Line Options

C:\Windows\system32\svchost.exe -k defragsvc

Log On As

Account: Local System account


What service Disk Defragmenter needs to function properly:

What other service require Disk Defragmenter to function properly:

  • None (S, HB, HP, P, U, E)

Additional Reading

None at this time.