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This will start the defrag process manually and you’ll see that Windows 8/10 does two passes to relocate fragmented data on the hard drive. You can manually optimize or defragment a drive in Windows 8/10 by selecting it and then clicking on the Optimize button. In Windows 8/10, the drives are automatically scheduled for optimization on a weekly basis.
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This will bring up the Optimize Drives dialog box where you will see a list of your drives and their current status (% fragmented).
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