The Windows XP disk defragmenter doesn't work on my computer. What's wrong?

A. I've heard of cases in which the disk defragmentation engine stops functioning, resulting in several problems, such as:

• When you attempt to Analyze or Defragment, Disk Defragmenter performs no actions.
• When you try running Defrag.exe from a command line or batch file, you receive a Windows cannot connect to the Disk Defragmenter engine error message.
• When you right-click a local hard disk and select Properties, the Defragment Now button isn't available on the Tools tab, or if it is available, pressing it displays the following error message: "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."

To resolve the problem, force a reinstallation of the disk defragmenter engine:

1. Navigate to the %SystemRoot%\INF folder (Start, Run, %SystemRoot%\INF) and click OK.
2. Right-click the dfrg.inf file and press Install.

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