How To Analyze and Defragment a Disk in Windows XP

This step-by-step guide describes how to perform maintenance on disk volumes on Windows XP-based computers. Analyzing and defragmenting disks can help to preserve the performance and general operation of the system.

Analyze a Disk Volume

To check for fragmented files and folders on a volume:

1. Click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Defragmenter.
2. Click the volume that you want to analyze.
3. Click Analyze to begin the analysis.
4. Review the results of the analysis after it is complete by clicking View Report. If the analysis tool recommends that the volume be defragmented, follow the steps in the next section.

Defragment a Disk Volume

1. If the Disk Defragmenter tool is not already running, click Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Defragmenter.
2. Click the volume that you want to defragment.
3. Click Defragment to begin the operation.
4. Review the progress of the operation in the Defragmentation Display window. Fragmented files on the disk appear in red, contiguous files are blue, and system files are green. The goal is to eliminate most of the red in the window.

Troubleshooting

Although any user can gain access to the Disk Defragmenter tool, the ability to analyze or defragment a volume requires administrator privileges. To run the defragmentation operation, you must be logged on as an administrator or as a member of the local Administrators group.

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What is a hard drive, and why do I need to defrag it?

Your hard drive is basically the brains of your computer, where all of your files get stored. For example, if you upload some pictures from your digital camera or install new software, that all gets stored on the computer’s hard drive.

But, unlike the human mind, your computer has a limited amount of memory to save information. This memory takes up physical space on the hard drive, and everything you save onto your computer takes up a little more space each time.

Wouldn’t it be easier just to delete some old files than learn how to defrag computer hard drives?

Unfortunately, computers don’t always save your files in the most efficient way. Sometimes files are parsed and stored in separate areas on the hard drive. With the more files you save, over time, that parsed data takes up more and more space. You may notice that some programs that used to start up quickly now take a minute to run. That’s because your computer has to sort through all that data to get to the right files. Defragging your computer arranges those files in a way that takes up less space so things continue to run smoothly. Think of it as an oil change for your computer.

How do I defrag my computer?

Luckily, learning how to defrag computer hard drives is a fairly simple process. Windows comes with built-in disk defrag software. To run it, open your Start menu, and select My Computer. When the folder opens, right-click on your hard drive, which is commonly labeled "Local Disc (C:)" to open a dropdown menu. Select Properties, and then click the Tools tab. You'll see an option to defrag your hard drive. Click it, and let it run.
The whole process of how to defrag computer hard drives may take a few hours, depending on how many files the program has to sort through. Using your computer during this process could ruin the defrag, so it’s best to leave it alone until it is complete.