O&O Defrag 31 is a comprehensive disk defragmentation solution that replaces Windows’ built-in defragmenter with advanced optimization features. It intelligently organizes fragmented files to boost system performance and reduce startup times.
The software offers five distinct defragmentation strategies, including SSD-specific methods, and features OneButtonDefrag technology for automatic optimization. With remote desktop capabilities and integration with O&O Syspectr cloud management, it provides both local and remote system maintenance solutions.
In This Post
Why It Stands Out
Quick Start with OneButtonDefrag
- Install O&O Defrag 31
- Launch the application
- Click OneButtonDefrag to automatically optimize your drives
- Review the optimization report for results
Why: OneButtonDefrag provides instant system optimization without requiring technical knowledge, delivering immediate performance improvements for all user levels.
Configuring SSD Optimization Settings
- Open O&O Defrag
- Select Configuration from the menu
- Choose Solid/Quick for routine SSD maintenance
- Schedule weekly optimizations for optimal drive health
Why: Proper SSD optimization extends drive lifespan and maintains read/write speeds, preventing performance degradation over time.
Using O&O StartupManager to Reduce Boot Times
- Navigate to O&O StartupManager in the main interface
- Review the list of startup programs
- Disable unnecessary applications with high impact ratings
- Restart your computer to apply changes
Why: Managing startup programs significantly reduces boot times and frees up system resources for active applications.
Download O&O Defrag Pro
File size: 63.5 MB
OS support: Windows
Windows
Software Specifications
| Software Name | O&O Defrag Pro |
|---|---|
| Version | 31.3.26064 |
| License | Paid (Shareware) |
| File Size | 63.5 MB |
| OS Support | Windows |
| Language | English, German |
| Developer | O&O Software |
| Homepage | https://www.oo-software.com/en/ |
| Changelogurl | https://www.oo-software.com/en/support/what-is-new |
| Last Updated | June 30, 2026 |
Main Features
- OneButtonDefrag Technology: Automatically selects and applies the optimal defragmentation method for your system without requiring manual configuration, making it accessible for users of all skill levels.
- SSD Optimization Strategies: Includes SOLID/Quick and SOLID/Complete methods specifically designed for SSDs, plus ClusterView visualization to monitor fragmentation levels and extend drive lifespan.
- Remote Desktop Integration: Enables remote management and optimization of family and friend computers from anywhere, providing technical support capabilities through integrated remote desktop functionality.
- O&O DiskCleaner: Removes temporary files, internet cache, and unnecessary data that consume disk space and contribute to fragmentation, helping maintain optimal system performance.
- Boot-Time Optimization: Performs system optimization before Windows starts, allowing defragmentation of normally locked system files for maximum performance gains.
- O&O StartupManager: Provides detailed analysis of startup programs with impact ratings, enabling users to disable unnecessary applications and reduce boot times.
- ARM Platform Support: Native support for ARM-based CPUs including those in Windows AI PCs, expanding compatibility to energy-efficient processors alongside traditional Intel and AMD systems.
- O&O VisualDisk: Visualizes write accesses to SSDs and NVMe drives, helping users understand how defragmentation reduces future write operations and extends drive lifespan.
Setup Instructions
Installation Steps
- Click the download button above to get the installer for your operating system
- Locate the downloaded file and double-click to run the installer
- Follow the on-screen installation wizard to complete setup
Compatibility: Compatible with Windows 7 and later versions
Fix Common Problems
- Issue: Installation fails → Solution: Run as administrator
Frequently Asked Questions
Is O&O Defrag free to download?
O&O Defrag offers a trial version for free download, with full functionality available through purchase of the Pro license.
What operating systems does O&O Defrag support?
O&O Defrag supports Windows 11, 10, and various Windows Server versions including 2012, 2016, 2019, and 2022.
How does O&O Defrag improve system performance?
It optimizes file placement on hard drives and SSDs, reducing fragmentation and improving data access speeds for faster system and program startups.
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