1. Clean the disk before sorting. In the My Computer window-right-click the drive to defragment-Properties-General-click Disk Cleanup-open the Disk Cleanup dialog box-check the files to be deleted-OK-Yes-the system will automatically clean up the selected files. 2. Scan the disk before finishing. In the "My Computer" window-right-click the drive to defragment the disk-Properties-Tools-Start Checking-Check Disk Options-Start-Check and confirm to exit. 3. Close all running programs, especially real-time virus monitoring programs and screensavers. 4. Disk defragmentation. My computer-right-click the drive to be defragmented-Properties-Tools-Select the disk to be defragmented to open the Disk Defragmenter window-Analysis-Defragmenter-the system will start defragmentation and will inform you when it is finished. Note: Do not read or write any data when sorting. Reading or writing at this time may cause the computer to crash. If this does not clean the selected disk, it must be cleaned in safe mode. 5. Use the disk defragmentation tool that comes with the system. If you can't defragment, you can use Optimizer and other software to defragment. Download address of Disk Defragmenter: /soft/784.html]