I have the same model and SOLVED
the Windows 7 compatibility problem. YES!
For the GEFORCE 7400 GO Video driver:
- Download the Vista Business driver and install it normally: Sony eSupport - VGN-SZ430N - Drivers & Software
For the Webcam Sony® Visual Communication Camera:
- Download the Windows XP 32 drive and install it: Sony eSupport - VGN-SZ430N - Drivers & Software
P.S.> When you are installing the Webcam driver you will receive a Windows message saying that "Windows cant verify the publisher of this driver software" (http://www.rolanddga.com/myroland/im...tion_img_7.jpg
CLICK ON "INSTALL THIS DRIVER SOFTWARE ANYWAY" !
I hope this works for you as worked for me!