The installed battery may not be properly connected to the computer on sony Vaio Laptop

Follow these steps to fix this problem.

1. Power off the notebook and remove the battery.
2. Make sure only the AC adapter is connected and power on the notebook.
3. Click the Start button, click All Programs , click Accessories , and then click Run .
4. In the Run window, type MSCONFIG and then press the Enter key.

5. In the System Configuration window, click the Startup tab.
6. On the Startup tab, click to uncheck the box in front of ISB Utility .

7. Click the OK button.
8. In the System Configuration window, click the Restart button.

9. Power off the notebook, reconnect the battery and power back on.