The issue first appeared during one of the major Windows 10 updates a few months ago. I upgraded from Windows 7 to Windows 10 Pro last year. Machine with the webcam plugged directly in to the motherboard USB.
Rolling back drivers does not appear to be an option as it is greyed out. This just takes me around in a loop with Windows reinstalling the same drivers. I have tried uninstalling the drivers, rebooting and scan for hardware changes. There isn't much point in having a webcam on a Windows 10 machine that is not recognised by the OS. The support page suggests looking for a stream.sys driver file which would indicate it is obsoleteīut the driver files are CamExt40V64.ax camdrv42.sys ksthunk.sys for video and dmk.sys ksthunk.sys portcls.sys and USBAUDIO.sys for the mic. Device Manager sees it and reports no problems. The Microsoft Camera app reports error 'We can't find your camera' 0xA00F4244(0xC00D36D5) which is not much help. It is now listed as a POS device (which are not renowned for their audiovisual communication capabilities).
The camera does not appear under 'Devices and Printers' so I tried adding it. It works fine using the original Philips app and I haveīeen using the old version of skype (7.33.0.104) despite prompts to update. Sometime during the upgrade to Windows 10 the camera ceased to be recognised by the OS. I have been using it with skype for years. I have a Philips SPC 900NC webcam that I use for various purposes.