File indexing is a Windows service that like many others, is totally
useless – unless you do a lot of searching on your computer. As most
users don’t, it’s a good idea to disable it to 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. At the bottom
of the window that opens, you should see a check box titled “Allow
Indexing Service to index the disk for fast file searching.” Uncheck
it.
Press OK and you’re done! Your computer should be a little faster
after a restart.