You need to re-install the Camera Driver after installing the Vista Operating System in the Computer. Please try installing the WIndows XP Camera Driver and the Vista Camera Application in the Computer to resolve the issue.
You can download the Camera Driver here.
Please download and save the file in a folder in the Computer. Then, please open the folder where the file is saved and double click on it to begin the installation. After installation of the Driver, please restart the Computer for the settings to take the effect.
Then, please download and install the Vista Camera Application and Updates in the Computer.
Download the VAIO Camera Capture Utility
Download the VAIO Camera Capture Utility Update
Sony Camera Filter Driver Update
Please install the VAIO Camera Capture Utility and Updates in the same order. Please restart the Compuer after each installation for the settings to take the effect.
This should fix it..