If not working Try This!
Here is Sony's E-support link.
Sony eSupport - Electronics Follow these instructions if need be.
1. Enter model number in the specified field. Click CONTINUE.
2. Choose which region you're in.
3. Scroll down to DRIVERS AND SOFTWARE and click on SEE ALL FILE DOWNLOADS AVAILABLE FOR YOUR MODEL.
4. Now in the SELECT YOUR OPERATING SYSTEM field select YOUR PREVIOUS VERSION OF WINDOWS and NOT Windows 7.
5. Click on NOTEBOOK CONTROL AND UTILITIES then click on ORIGINAL-SONY NOTEBOOK UTILITIES.
6. Download and install and relax.