I have a Lenovo 450 laptop with me and from the past few days, I have started experiencing the problem. The camera was not showing any picture. Therefore, I have checked the hardware and found no issue in the hardware. I have rebooted my laptop with the help of Linux OS using a USB pen drive and under Linux camera worked properly.
Therefore, I have checked the answers.microsoft.com site and found the following solution.
I have tried implementing the above-mentioned solution and found out that when I implemented both the steps; i.e. implementation of register value in step number 1 and step number 3 but it did not resolve the problem.
Then I removed the registry key mentioned in number 1 step and after that, I found the camera is working but it is in on and off mode. It is like the camera is blinking.
Please note that I am using a legitimate version of Windows 10 which I bought/received along with the purchase of the mentioned laptop. Please let me know if you need any serial number or product number from me.