File indexing is a Windows service which is used mainly in searching process.So, if you do not search very frequently then you can disable this option. Believe me this will make your Windows xp to run little faster.This will speed up actions like opening and closing files and folders on your Windows XP.

To disable the Indexing Service-
Go to My Computer and right click on your hard drive click on properties. At the bottom of the window that opens, you will see a check box titled Allow Indexing Service to index the disk for fast file searching.

Uncheck it. And you are done.

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