Disk Defragmenter

When your computer saves files, it saves them in what are called "sectors". These sections are in segments of concentric circles. But, when you delete a file, your computer doesn't actually delete the complete file from the sector. Through normal use of your computer as you save and delete files, you end up with a patchwork of open holes where your computer can save files, rather than long, contiguous segments. Your hard drive becomes "fragmented." If you notice your computer is taking longer to save and retrieve files, it may be that it is in need of being defragmented.

To defragment your hard drive:

Newer versions of Windows (XP): Go to "Start", up to "Accessories", over to "System Tools", and over to "Disk Defragmenter". A dialogue box will pop. Click "Analyze". Your computer will determine whether or not you would benefit from defragmenting your hard drive. If it comes back suggesting that you would benefit, click "Defragment". This will likely take quite a few minutes. (During this time, you may want to turn your screensaver off, since this can sometimes interfere with the defragmenting process.)