I installed Windows Movie Maker on my Dell Optiplex 455 desktop computer which utilises Window 8.1. I have a Logitech camera with microphone attached to the computer. When I try to record a movie or dub sounds onto a movie direct to WMM it comes up with an error message "class not registered".

I've read the instructions and doesn't mention this problem. When I click on Capture Video it shows the device but on video input source it isn't selectable.

I'm having similar problems with audio. When I select the microphone on the storyboard panel I get the same message "class not registered".Is there something I'm missing with the installation??