As I search and search it is exactly as I said, I have found another couple solutions that have worked for some and not others but in your case every possibility counts.
Solution 1: Check to make sure you have DirectX9c or higher.
Click ‘Start’ then if you have ‘Run’ click it, if not then in the search box at the bottom type dxdiag ‘Enter’
In the windows that opens, it should be on the ‘System’ tab. Bottom of the list will say ‘DirectX Version’ If not at least 9c, download 11 here.
Then click the ‘Display’ tab, in the middle you will have a box named ‘DirectX Features’ make sure all 3 are enabled and that under ‘Notes’ there are no problems as shown here:
If there are any problems or things not enabled, try installing 11 from the link above even if you already have 11, a fresh install may fix things.
Suggestion 2: Make sure Skype is disabled from auto-starting w/Windows so that you can make sure your webcam drivers load BEFORE Skype starts.
Make sure you are signed out then in the ‘Welcome to Skype’ window, uncheck ‘Start Skype When Computer Starts.’ Close Skype, reboot your computer and try again.
Suggestion 3: This one is not so much a solution as a way to keep tabs on if things fix after trying each possibility. Use the Skype client to check your audio and video. In Skype, click ‘Help’ > ‘Call Quality Guide’ > ‘Sound Check Wizard’ Though it says sound, it will check both audio and video.
After you have tried everything in my previous answer and everything here, it may just come down to a situation where you are not going to be able to use the built-in camera w/Skype. I know that’s not an answer someone wants to hear, but sometimes hardware and software just will not work together no matter what you do. As I told you previously, if you were to call Sony and explain to them that you bought this laptop strictly to use the built in cam w/Skype and you want it to work or else, they would probably run you through some troubleshooting just as I have, but in the end if they can’t get it working, they will simply tell you as long as the webcam is working on the system which you said it was but video froze on Skype after 2-4 mins, that it’s not an issue with the hardware it’s third party software. Skype would tell you the reverse, if you can install and run our software, it’s not our problem, use a different camera. I know it’s not fair and makes you feel like you’re getting jammed in the rear from both ends, but it’s the sad reality of the issue. I told you how I had the same issue w/my Vaio a couple years ago, I was able to fix mine, but I had your same issue w/my wife’s laptop and Juno and their video chat feature. Juno is a free email service that a while back introduced video chat. I had your same issue that her video would freeze after only a couple seconds, I spent weeks troubleshooting, and I don’t know how being that Juno provides no support for its free users only premium members, but I got someone on the phone who was willing to try a couple things. In the end I just could not make it work and had to buy an external usb webcam which worked fine from the start.
Suggestion 4: One other thing you could try is using a different version of Skype, I’m not talking about going all the way back to version 1, but I’m giving you a link to a site that has every version of Skype ever released free for download. I checked the Win7 Compatibility checklist site, and the only version it says will not work on 7 is version 2 free, everything else lists compatible. Try going 1 – 2 versions different, it’s going to be trial and error to see if it helps and a lot of uninstalling / re-installing, but if it solves your problem, it will be worth it. If your using version 5, try the latest release of 4, if that doesn’t work, try the earliest release of 4. If you’re using 4, try 5 then 3. Skype Old Versions
Suggestion 5: Lastly, here is a link to the Sony page specifically for your laptop. Click on the ‘Drivers & Software’ tab then select your operating system from the drop-down list. There are a couple things I noticed in there that you could try downloading, you may already have these versions, but it’s an option. Under ‘Camera’ there’s 2 things, under ‘Sony Applications’ start w/Vaio Care then some of the other diagnostic items listed, try hardware diagnostics software, under Video make sure you have the latest graphics driver.