To turn off indexing:
Open up "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..."
Click OK, and files will be removed from memory. This removal may take a few minutes to complete.
To disable the indexing service:
In the "Start" menu, 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."
Windows search will still work if you perform these steps, but it will work more slowly than if indexing was enabled.