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How to fix 100% disk usage on a Windows computer (Nothing else worked)

Why is the disk usage at 100%? How to fix it?

The CPU, RAM, and the disk are like boxes. You can fit things in as much as the boxes can handle, and no more. There are times however, when the computer is led to believe that the disk, RAM, or CPU are being used at their fullest capacity, even though they aren't.

The reasons why the disk usage may be at 100% include:

  • Malicious software (virus);
  • Defective disk;
  • Unresponsive program;
  • Demanding program;
  • Outdated drivers.

The solutions listed below will teach you how to fix this error on Windows 8.1, and Windows 10 computers, and normalize the disk usage. Feel free to check them out.

Select specifications which apply:

Click on this if your computer runs on Windows 8.1.

Click on this if your computer runs on Windows 10.

Click on this if none of the other solutions worked.

  1. Upgrade your computer's hard drive (or SSD)

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  2. Reinstall your device's operating system

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