84,488,480 programs installed

Should I remove Smart Defrag 4 Pro?

What percent of users and experts removed it?
22% remove it78% keep it
Overall Sentiment
What do people think about it?
(click star to rate)
How common is it?
Global Rank #13,287
United States Rank #12,511
Reach 0.0230%
Lifespan of installation (until removal)
< 12.48 days
368.27 days >
Average installed length: 193.50 days


4.3 50.44%
4.2 20.48%
4.1 15.64%
4.0 13.44%

Other programs by IObit

Smart Defrag 4 Pro


Smart Defrag 4 Pro is a program developed by IObit. The most used version is 4.3, with over 98% of all installations currently using this version. Upon installation and setup, it defines an auto-start registry entry which makes this program run on each Windows boot for all user logins. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version). The main program executable is smartdefrag.exe. The software installer includes 32 files and is usually about 31.87 MB (33,416,375 bytes). LiveUpdate.exe is the automatic update component of the software designed to download and apply new updates should new versions be released. In comparison to the total number of users, most PCs are running the OS Windows 10 as well as Windows 7 (SP1). While about 45% of users of Smart Defrag 4 Pro come from the United States, it is also popular in United Kingdom and Italy.

Program detailsProgram details

URL: www.iobit.com
Installation folder: C:\Program Files\IObit\Smart Defrag 4\
Uninstaller: "C:\Program Files\IObit\Smart Defrag 4\unins001.exe"
Estimated size: 31.87 MB

Program filesFiles installed by Smart Defrag 4 Pro

Program executable:smartdefrag.exe
Name:Smart Defrag
Smart Defrag v4
Path:C:\Program Files\iobit\smart defrag 4\smartdefrag.exe
Additional files:
  • taskMgr.dll - IObit TaskSchedule Dynamic Link Library
  • RegisterCom.dll - IObit Register Dynamic Link Library
  • RegisterCom.dll.dll
  • OFCommon.dll - Advanced SystemCare Ultimate (IObit Library)
  • ActionCenterDownloader.exe - Advanced SystemCare 8 (Action Center Downloader)
  • defragsetup-pro.exe - Smart Defrag 4 Pro (Smart Defrag v4)
  • LiveUpdate.exe - Product Updater
  • AUpdate.exe - IObit AUpdate
  • AutoUpdate.exe - Smart Defrag (Smart Defrag Updater)
  • GameScaner.dll - Game Scaner
  • SDInit.exe - Configuring Smart Defrag
  • SDInstaller.exe - Smart Defrag Installer
  • UpgradeTips.exe
  • SDDriverMgr.dll - SDDriverMgr
  • SDFreeBigUpgrade.exe - UpgradeTip (Show new Smart Defrag function)
  • SDProBigUpgrade.exe
  • LocalLang.exe
  • NtfsData.dll - NtfsData
  • sdassist.dll
  • sdcore.dll - sdcore
  • sdlib.dll - sdlib
  • SendBugReportNew.exe - Send Bug Report
  • UninstallPromote.exe

Program behaviorsBehaviors exhibited

Scheduled Task
  • SmartDefrag.exe is scheduled as a task named 'SmartDefrag4_Defrag' (runs weekly on Mondays at 22:00).
2 Scheduled Tasks (Boot/Login)
  • AutoUpdate.exe is automatically launched at startup through a scheduled task named SmartDefrag_Update.
  • SmartDefrag.exe is automatically launched at startup through a scheduled task named SmartDefrag4_Startup.
Startup File (All Users Run)
  • SmartDefrag.exe is loaded in the all users (HKLM) registry as a startup file name 'Smart Defrag 4' which loads as "C:\Program Files\IObit\Smart Defrag 4\SmartDefrag.exe".

How do I remove Smart Defrag 4 Pro?

You can uninstall Smart Defrag 4 Pro from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program Smart Defrag 4 Pro, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove Smart Defrag 4 Pro.

Win 10 64%
Win Vista (SP1) 0%
Automatically starts? Yes
(Found in the run registry)
Uninstall it 22%
Keep it 78%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 10 64.32%
Windows 7 32.60%
Windows Vista 1.98%
Windows XP 1.10%
Which OS releases does it run on?
Windows 10 Home 23.45%
Windows 10 Pro 19.25%
Windows 7 Home Premium 17.26%
Windows 8.1 10.62%
Windows 7 Ultimate 8.41%
Windows 7 Professional 5.31%

Distribution by countryGeography

45.37% of installs come from the United States
Which countries install it?
  United States 45.37%
  United Kingdom 9.26%
  Italy 5.00%
  France 3.52%
  Germany 3.52%
  Netherlands 2.96%
  Australia 2.78%
  Sweden 2.78%
  Canada 2.78%
  Russia 2.59%
  Brazil 2.41%
  DZ 1.48%
  Czech Republic 0.93%
  UA 0.74%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 26.24%
Dell 21.67%
Acer 17.11%
ASUS 11.03%
Toshiba 6.46%
Lenovo 5.32%
Samsung 3.04%
American Megatrends 1.52%
Medion 0.76%
Intel 0.76%
Common models
ASUS All Series 7.78%
Dell XPS 8700 2.99%
Dell Inspiron 3521 2.40%
HP Pavilion dv7 Notebook ... 2.40%
TOSHIBA SATELLITE C670-14... 1.80%
Dell Latitude E6420 1.80%

About (from IObit)

Founded in 2004 by two creative and enthusiastic programmers, IObit is focused on providing consumers with innovative and comprehensive system utilities and security software for superior PC performance and security.
Publisher URL: www.iobit.com


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