1. Make sure the scanner is pluggin in.
2. Go to Start Menu-->Control Panel.
3. Open Scanner & Cameras by double-clicking on the icon.
4. Right-Click on the SmartSource Micro / MicroEx scanner icon.
5. On Windows XP you will get a context menu. Select Calibrate from the context menu.
6. On Windows Vista, select the SmartSource Micro scanner icon and then click the [Properties] button. In the Properties dialog that comes up, go to the Advanced tab and click on the [Calibrate] button.