Step 1: Go to the Academic Software page of Defraggler and click the green button ‘Download Defraggler’ to download the installer.
Step 2: Open the .exe installer file in your downloads folder and click Install to start the installation with default settings. If you want, you can click Customize to edit advanced settings.
Stap 3: Defraggler is installed. Click 'Run Defraggler' to start using it.