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What is defrag.exe?

Part of Windows Disk Defragmenter by Microsoft and Executive Software International

(defrag.exe is a system file that is installed with Windows)
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How does defrag.exe run?

Process - defrag.exe is an instance of a running program. This program executes under the SYSTEM account within Windows with extensive privileges on the local computer, and acts as the computer on the network. defrag.exe is executed by the process svchost.exe (Generic Host Process for Win32 Services by Microsoft).

How does defrag.exe start?

Scheduled task - defrag.exe is launched automatically by registering itself into the Windows Task Scheduler under the task name 'C:\WINDOWS\Tasks\defrag.job'. Task Scheduler provides the ability to schedule the launch of programs or scripts at pre-defined times or after specified time intervals or even with event-based triggers.


What is the community is seeing?What is the community is doing?
About 0.3% of all Boost users have the defrag.exe process running.Of the 0.3% of defrag.exe users, less than 1% have disabled it.
How resource intensive is defrag.exe?
Comparison based on the average resource utilization across all programs.
0.00000% CPU38.1%
Average CPU utilization across all programs is 0.00001%.
     1.09 MB RAM5.0%
Average private memory utilization across all programs is 21.53 MB.
         4 GDI objects2.7%
Average number of GUI GDI and USER objects for all programs is 150.
Typical file (disk image) location:

Are there other versions of Windows Disk Defragmenter?

Why are multiple of the same versions listed?

What else is related?

What Windows OS versions does this run on?

Microsoft Windows XP (5.1.2600.196608)

About Microsoft Corp. and Executive Software International, Inc.

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: defrag.exe
Name: Windows Disk Defragmenter
Description: Disk Defragmenter Module
Version: 5.1.2600.5512 (xpsp.080413-2111)
Product version: 5.1.2600.5512
Size: 24.5 KB
Original file name: Defrag.EXE
Windows file protection: Yes

Resource utilization

CPU utilization averages
Total CPU: 0.0000322480%
Privileged CPU: 0.0000284346%
User CPU: 0.00000381338892%
Privileged CPU time: 34375 ms
Privileged CPU time /min: 0 ms
Memory utilization averages
Committed memory: 32.51 MB
Peak committed memory: 34.84 MB
Paged memory: 1.09 MB
Peak paged memory: 1.13 MB
Paged system memory: 62.26 KB
Non-paged system memory: 2.97 KB
Working set memory: 192 KB
Peak working set memory: 3.4 MB
Min working set memory: 192 KB
Private memory: 1.09 MB
Page faults: 972
Page faults /min: 0
Process I/O averages
Total read operations: 71
Total read transfer: 107.07 KB
Total write operations: 5
Total write transfer: 388 Bytes
Total other operations: 273
Total other transfer: 3.36 KB
GUI Object Averages
GDI objects: 4
USER objects: 1
Handle count average: 104
Thread count average: 2

Process details

Runs as (owner): System
Integrety level: Undefined
Windows platform: 32-bit
Parent Process
Process Command
"C:\WINDOWS\system32\defrag.exe" -p 4f8 -s 000012B8 -b C:

Scheduled task details

Name: defrag
Command: C:\WINDOWS\Tasks\defrag.job

Image hashes

MD5: b56bb7c3a936af51dba14368773b485f
SHA-1: 056e219174594d14b4ae5280eeb9daaf6a73d8a6
SHA-256: 42e566f3683dcef87475176aa9f313f46f4215c39db895c6999030c9d2e937f1

PE image details

Subsystem: Windows Console
Langauge*: Microsoft Visual C++
File packed: No
Import Table
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