To disable Indexing Service, follow these steps:

1. Open My Computer.
2. Right-click the Drive icon (perhaps you call it "Local Disk") and select Properties.
3. Remove the checkmark from "Allow Indexing Service to index this disk for fast file searching."
4. Click Apply.
5. Make certain to select "Apply changes to :, subfolders and files."
6. Click OK in the new window.

Also:

1. Click on Start
2. Click on Search
3. Click on "With Indexing Service"
4. (If that is not there, click on "Change Preferences", then "With Indexing Service")
5. Select "No, do not enable Indexing Service"