Double click on the My Computer icon. Right mouse click on the [C:] drive. Select properties from the drop down box options.

A dialog box named [C:] Properties will appear (Verify that the free space is at least 100MB, if not remove any unneeded documents or applications and empty the Recycle Bin. To empty recycle bin, right mouse click on the desktop icon and follow select appropriately. If your Drive does not have enough room to operate swapping files, it will crash eventually). Select the Tools tab on the upper left corner.

Select the Defragment Now button from the error-checking status section. This should be ran about every 30 days.

Select the Analyze button. Once hard drive is finished analyzing proceed to the next step.

Select the Defragment button.

A dialog box will appear stating defragmentation is complete. Close the window and the process is complete.