If the drivers and webcam software are correctly installed, and you still cannot see any video, there can be a problem with the program settings.Most chat and meeting software have a configuration option to select the video source for the webcam feature.In case no driver for the webcam can be found, you can try a third party driver finding program that scans your PC for installed hardware and allows you to install missing drivers.If this fails, the next step would be to uninstall the software that came with your webcam.The example shows the video capture properties for an Acer Crystal Eye webcam.
In the example you can see that some settings are disabled.
For build-in webcams this steps does of course not apply. Also try connecting your webcam directly to your PC instead of through a USB hub (if you are using one).
But don’t forget to check if you need to manually activate your webam.
After uninstalling the software, restart your PC and then reinstall the webcam software. Depending on the software, you might need to unplug your webcam during the software installation.
For many HP systems you need to install the Cyber Link You Cam software, which can be downloaded from the HP site (for Windows 7 and Windows 8).
But is does not harm to check if your Java, Flash and Quicktime software are installed and up to date.