- Go to System Preferences, Select Spotlight
- Go to the Privacy tab in the Spotlight system preferences
- Click the "+" button
- Press Shift-Command-C to reveal your hard drives (if they are not available otherwise), or simply navigate to your hard drive (most likely MacintoshHD)
- If you have more than one hard drive, hold the Command key and click your various drives to add them to your selection
- Click the “Choose” button to add them to the Privacy list
- Ignore the warning.
- Remove the hard drive by clicking the "-" sign.
- Have a nice day :)