How to defragment your PC's hard drive on Windows 10

[Windows Central]

Is your PC slowing you down? Use this guide to defragment files using the Optimize Drives tool on Windows 10.
In order to minimize slow hard drive performance, Windows 10 (and so Windows 8.1, Windows 7, and previous versions), includes a built-in tool to defragment all fragmented files and help your PC stay at top speeds.

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