Hidden Partitions displayed in Disk Defragmenter Tool To open it, type defrags in Windows search, select Defragment, and Optimize Drives from the search results.

Even if error-checking reports no problems, you should defragment the drive. That will reorganize files so your system can find them faster. You'll find Windows' built-in Disk Defragmenter tool by ...

Glarysoft Disk SpeedUp is a free software to analyze, defragment and optimize hard disk space in quick time and enhance your Windows computer performance.

Alternatives to Vista’s Defrag Tool Hard drives do indeed get fragmented over time, which is why defrag utilities exist.