IObit Smart Defrag is a free and powerful disk defragmentation utility. It optimizes disk performance to enhance hard drive efficiency. It also extends disk lifespan. It utilizes an enhanced multi-threading defrag engine to rearrange fragmented data quickly and thoroughly. The tool supports both traditional HDDs and modern SSDs, offering specialized optimization methods for each drive type. This utility is essential for maintaining a fast and stable Windows PC by addressing the primary cause of system slowdown: disk fragmentation.
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Quick Start & Pro Tips
Configuring Boot Time Defrag for System Files
- Open IObit Smart Defrag and navigate to the Boot Time Defrag tab.
- Click the Settings icon (gear) in the top-right corner.
- Select Boot Time Defrag from the left-hand menu.
- Ensure the checkbox for Defragment specified files is ticked.
- Verify that critical system files like the Master File Table (MFT), page files, and hibernation files are selected for pre-boot optimization.
Why: The Boot Time Defrag feature is critical for optimizing files that are locked by the Windows kernel during runtime, such as the MFT and system registry files. Defragmenting these files before the OS fully loads significantly accelerates system startup and overall stability by ensuring contiguous block allocation for core components.
Optimizing SSDs with TRIM and Intelligent Optimize
- In the Disk Defrag tab, select your Solid State Drive (SSD).
- Instead of a standard defrag, select the Trim & Intelligent Optimize option.
- Alternatively, you can run a manual Trim operation.
- For advanced users, navigate to `Settings > Optimization` to review the intelligent optimization algorithm.
Why: Traditional defragmentation is detrimental to SSD lifespan. Smart Defrag correctly identifies SSDs and applies the TRIM command, which securely wipes data blocks no longer in use. This process, combined with intelligent optimization, maintains the SSD’s performance and extends its durability without unnecessary write cycles.
Download IObit Smart Defrag 11.2.0.472
Size – 16 MB
Windows
Hardware Requirements
Minimum
- OS: Windows 11/10/8.1/8/7/Vista/XP
- Processor: 1 GHz processor or faster
- Disk Space: 200 MB of free hard disk space
Recommended
- RAM: 4 GB RAM
| Software Name | IObit Smart Defrag |
|---|---|
| Version | 11.2.0.472 |
| License | Free |
| File Size | 16 MB |
| OS Support | Windows 11, 10, 8.1, 8, 7, Vista, XP |
| Language | Multi-language (35+ languages) |
| Developer | IObit |
| Homepage | https://www.iobit.com/ |
| Last Updated | January 6, 2026 |
Notable Features
- Boot Time Defrag Technology: Defragments system files, including the Master File Table (MFT), paging files, and hibernation files, before the operating system fully loads, ensuring a quicker system boot time.
- SSD TRIM and Intelligent Optimization: Provides dedicated optimization for Solid State Drives (SSDs) by performing TRIM operations to wipe unused data, which helps to accelerate disk read/write speed and extend the SSD’s lifespan.
- Enhanced Multi-Threading Defrag Engine: Leverages a new, multi-threaded defrag engine to rearrange fragmented data on HDDs quickly and thoroughly, resulting in improved data access and outstanding disk performance.
- Large Files Defrag and Free Space Consolidation: Includes specific modes like Large Files Defrag to accelerate disk read/write speed for large files and Free Space Defrag to consolidate free space into a large contiguous block for better performance.
- Disk Health Monitor: Monitors the disk status in real-time, providing data on Temperature, Usage, and a Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T.) report to help users keep track of drive condition.
Fix Common Problems
FAQ
Does IObit Smart Defrag support Solid State Drives (SSDs)?
Yes, IObit Smart Defrag supports both HDDs and SSDs. For SSDs, it performs a specialized TRIM operation and intelligent optimization rather than traditional defragmentation to improve performance and extend the drive’s life.
Is IObit Smart Defrag 11.2.0.472 completely free to use?
The base version of IObit Smart Defrag is freeware and can be used without cost. There is also a PRO version available for purchase that unlocks additional features like automatic updates and deeper optimization.
What is Boot Time Defrag and how does it work?
Boot Time Defrag is a feature that allows the utility to defragment files that are normally locked and cannot be moved while Windows is running. This includes critical system files and metadata like the MFT, which results in a faster system startup.
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