Q. Disk Defragmenter does not work on your Windows XP computer?Q. Disk Defragmenter does not work on your Windows XP computer?

When you attempt to Analyze or Defragment, Disk Defragmenter doesn't do anything. When you try Defrag.exe from a CMD.EXE window, or batch, you receive a Windows cannot connect to the Disk Defragmenter engine error message. When you right-click a local hard disk and press Properties, the Defragment Now button is not available on the Tools tab, or it is available, pressing it displays the following error:

The Disk Defragmenter is not installed on your computer. To install it, double-click the Add or Remove Programs icon in Control Panel, click the Install/Uninstall tab, and then follow the instructions on your screen.

This behavior will occur if the Disk Defragmenter is not installed.

To install the Disk Defragmenter:

1. Start / Run / %SystemRoot%INF / OK.

2. Right-click the DFRG.INF file and press Install.