Have you tried installing the drivers for Windows 7? The links you have provided says it is for windows vista. Please try to download and install the drivers under Windows 7. You can find them here. Thank You!
Welp, neither work because neither seem to be drivers. Have you tried first install the Vista driver then installing the WebCam Companion® Software? as that seems to be the order it wants you to install them. It's partially due to the funny way Sony categorizes the drivers. If the driver is updated for the operating system then the driver will appear under the correct operating system you are using (Windows 7 driver goes under Windows 7). If the driver wasn't updated for the new OS then it will stay under the old OS. The old drivers usually work with the new operating systems. If you haven't, try the Vista driver and check back with us.
It worked! Thanks Keiran! I had tried all four drivers for windows 7 and Vista but when I wanted to do it again, by installing the first driver for windows vista finally the webcam and microphone started working.