Repair and Download SDInit.exe

Last Updated: 07/06/2021
[Reading Time Required: 3.5 minutes]

SDInit.exe uses the EXE file extension, which is more specifically known as a SDInit file. It is classified as a Win32 EXE (Executable application) file, created for Smart Defrag by IObit.

SDInit.exe was first developed on 09/18/2019 for the Windows 10 Operating System in Smart Defrag This file release marks the latest and most updated version from IObit.

In this article, you will find detailed SDInit.exe information, a EXE file troubleshooting guide, and a list of versions that are available for free download.

File Analysis Provided by Jason Geater (Author)

Recommended Download: Fix SDInit.exe / Smart Defrag-related registry issues with WinThruster.

Compatible with Windows 10, 8, 7, Vista, XP and 2000

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File Overview

General Information
File Name: SDInit.exe
File Extension: EXE file extension
Description: SDInit
Object File Type: Executable application
File Operating System: Win32
MIME Type: application/octet-stream
User Popularity Rating:
Developer and Software Information
Software Developer: IObit
Software Program: Smart Defrag
Legal Copyright: © IObit. All rights reserved.
File Details
Character Set: Windows, Latin1
Language Code: English (U.S.)
File Flags: Pre-release
File Flags Mask: 0x003f
Entry Point: 0x11036c
Code Size: 1108992

What are SDInit.exe Error Messages?

SDInit.exe Runtime Errors

Runtime errors are Smart Defrag errors that occur during "runtime". Runtime is pretty self-explanatory; it means that these EXE errors are triggered when SDInit.exe is attempted to be loaded either when Smart Defrag is starting up, or in some cases already running. Runtime errors are the most common form of EXE error you will encounter using Smart Defrag.

In most cases, SDInit.exe runtime errors occurring while the program is running will result in the program terminating abnormally. Most of these SDInit.exe error messages mean that Smart Defrag was either unable to locate this file on startup, or the file is corrupt, resulting in a prematurely-aborted startup process. Generally, Smart Defrag will be unable to start without resolving these errors.

Some of the most common SDInit.exe errors include:

  • SDInit.exe - Bad Image.
  • SDInit.exe Application Error.
  • SDInit.exe could not be found.
  • SDInit.exe could not be installed.
  • SDInit.exe could not be launched. Class not registered.
  • SDInit.exe could not be started.
  • SDInit.exe failed to initialize properly.
  • SDInit.exe has encountered a problem and needs to close. We are sorry for the inconvenience.
  • SDInit.exe is not a valid Win32 application.
  • SDInit.exe is not running.
  • Cannot find SDInit.exe.
  • Error starting program: SDInit.exe.
  • Faulting Application Path: SDInit.exe.
  • The file SDInit.exe is missing or corrupt.
  • Windows failed to start - SDInit.exe.
System Error

The program can’t start because SDInit.exe is missing from your computer. Try reinstalling the program to fix this problem.

Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

Finding the source of the SDInit.exe error is key to properly resolving these errors. Although most of these EXE errors affecting SDInit.exe will happen during startup, occasionally you will encounter a runtime error while using Smart Defrag. This can occur due to poor programming on behalf of IObit, conflicts with other software or 3rd-party plug-ins, or caused by damaged and outdated hardware. Also, these types of SDInit.exe errors can occur if it has been accidentally moved, deleted, or corrupted by a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix SDInit.exe Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your SDInit.exe issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the SDInit.exe error, please proceed to the Step 2 below.

Step 2: If recently installed Smart Defrag (or related software), uninstall then try reinstalling Smart Defrag software.

You can uninstall Smart Defrag software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Smart Defrag and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Smart Defrag software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Smart Defrag


Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many SDInit.exe error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the SDInit.exe error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your SDInit.exe File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate SDInit.exe file version. We maintain a comprehensive database of 100% malware-free SDInit.exe files for every applicable version of Smart Defrag. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download SDInit.exe Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Smart Defrag folder location:
    Windows 10: C:\Program Files (x86)\IObit\Smart Defrag\
  4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve SDInit.exe problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

Download SDInit.exe Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying SDInit.exe to your appropriate Windows system directory. IObit typically does not release Smart Defrag EXE files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing SDInit.exe and all other EXE files for Smart Defrag. An incorrectly installed EXE file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10

Files Related to SDInit.exe

EXE Files Related to SDInit.exe

File Name Description Software Program (Version) File Size (bytes) File Location
ToastHander.exe Windows Executable Smart Defrag ( 119584 C:\Program Files (x86)\IObit\Smart Defrag\
StoreExperienceHost.exe Windows Executable Smart Defrag 18944 C:\Program Files\WindowsApps\Microsoft.StorePur...
SmartDefragBootTime.exe SmartDefrag SmartDefrag ( 36824 C:\Windows\System32\
Setup.exe Smart Defrag Installer Smart Defrag (6.0) 4321040 C:\Program Files (x86)\IObit\Smart Defrag\
FeedBack.exe Smart Defrag Feedback Smart Defrag (6.0) 2405648 C:\Program Files (x86)\IObit\Smart Defrag\

Other Files Related to SDInit.exe

File Name Description Software Program (Version) File Size (bytes) File Location
CBS.log Log Smart Defrag 888642 C:\Windows\Logs\CBS\
setuperr.log Log IObit Toolbox 1.2 23532 C:\Windows\Logs\DPX\
symbol.ttf TrueType Font IObit Toolbox 1.2 70128 C:\Program Files\WindowsApps\Microsoft.Office.O...
setupact.log Log Start Menu 8 22792 C:\Windows\System32\Sysprep\Panther\
setupact.log Log Smart Defrag 23402 C:\Windows\System32\Sysprep\Panther\


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