O&O Defrag Professional Edition is a powerful tool used for defragmenting partitions, thus optimizing your computer's performance.
The user interface is easy to follow. It has a ribbon bar that displays all possible actions made in O&O, a list of available local drives, and a few tabs: cluster view, history of fragmentation, drive status, jobs, reports, and file status.
The cluster view displays the amount of clusters arranged graphically as a block. The blocks are shown in prioritized colors - free, compressed, allocated, fragmented, reserved for MFT, system, paging file, locked exclusively, being processed, and folders.
Shadow Copy is a feature that automatically creates copies of files that are currently being used, at regular time intervals. It can be either enabled or disabled.
Disk defragmentation can be performed in several ways - Stealth (faster and uses little memory), Space (consolidates data, and further fragmentation is prevented), Complete / Name, Complete / Modified, or Complete / Access (these three methods also reorganize file structure in alphabetical order, or according to the last time when they were modified or accessed).
Furthermore, it is possible to schedule a defragmentation (once, or at a regular time interval), so it automatically performs.
O&O Defrag Professional Edition can also adapt itself to system load (thanks to the O&O Activity Guard), create a before and after report, use power management for notebooks, defrag when the screensaver is running, defrag multiple drives simultaneously or individual files and directories, and more.
Our tests were run on a heavily fragmented partition of 250GB, and O&O did a good job, but not extraordinary. Space could have been further optimized.
CPU and memory are either moderately or highly demanded (according to the type of defragmentation) when O&O is performing a task.
All in all, O&O Defrag Professional Edition is a great piece of software for defragmentation purposes. It improves the boot time and the overall performance of your computer.

Limitations:
· 30 days trial
· Nag screen

What's New in This Release:
Quick configuration of O&O Defrag:
· The Quick configuration allows you to automate defragmentation with just a few mouse clicks right after the first start of O&O Defrag or at a later time. Once defined, you will never have to worry about the optimization of your hard disk again. Everything will be handled by O&O Defrag in the background. The default settings we propose are adapted to the needs of most our customers.
Optimized control of zones:
· The user can specify the file order in the drive individually by creating rules for them. In addition to changing zone filing, it is also possible to specify the optimization strategy for each zone. That is why O&O Defrag is still able to optimally enhance the performance, even if there are areas with special requirements.
O&O ActivityMonitor:
· The O&O ActivityMonitor periodically determines the system load. It controls the performance demand of O&O Defrag during a defragmentation and adapts it to the current state. You can thereby work...