System optimization unable to defragment disk

4.5

The defragmentation tool fails to start or finishes instantly with "0% optimized".

Symptoms
  • "Optimization not available"
  • Drive not showing in list
  • Slow disk performance
Possible Causes
  • SSD detected (SSDs shouldn't be defragged)
  • Disk errors
  • Insufficient free space

Step-by-Step Fix

1

Check Drive Type

If you have an SSD, Windows will "Trim" it instead of defragging. This is normal.

2

Free Up Space

You need at least 15% free space for defragmentation to work.

3

Run CHKDSK

Fix any file system errors before attempting to defrag.

When to See a Technician

NEVER manually defrag an SSD; it adds unnecessary wear and provides no speed benefit.

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