I read these and other topics before I asked the forum question, there is a Skype message -
"The latest version of Skype for Windows includes changes that have improved video calls, group video calls and screen sharing. Unfortunately, these changes mean that on some older computers video calls and screen sharing will not work.
If your computer does not support SSE2, you will not be able to use video calls or screen sharing. Most modern computers provide SSE2 support (a set of processor instructions introduced in 2001), but there are still computers that will not be able to run all the functions in the latest version of Skype. Unfortunately, there are no plans to provide support for these older computers, but You can still use Skype on various computers and mobile devices. "
I have a netbook dell inspiron 17, win 10 has long been installed, which is automatically updated, so far there have been no problems with the camera, until today's update.