Windows XP by default indexes all your files so when you do a windows search the results appear faster but this service is a major resource hog. If you don’t use the search function alot you can disable this service and speed up your computer. Here’s how.

Step 1. This will delete your index file.

Click “My Computer.”
Right-click on your hard drive (usually “C:”) and choose “Properties.

Uncheck the box at the bottom that reads “Allow Indexing Service to Index this disk to allow for fast file searching. Then click Ok. This may take a few minutes to complete.

Step 2.

Click “Start” then choose “Run.”

Type “services.msc” and press Enter.

Scroll-down to “Indexing Service” and double-click it.

If the service status is “Running”, then stop it by pressing the “Stop” button.

To make sure this service doesn’t run again, under “Startup Type”, choose “Disabled.”