Why does the buit-in camera (motion eye) stop working after my first upgrade of my sony vaio?

[J2008]

Please can anyone give me some hint?

Just bought VGN-SZ4XWN/C and managed to use the built-in camera on skype yesterday. However, after I ran 'VAIO update 3' (for the first time) today, the camera stopped working once I tried video chat on my skype.

Thanks!