This is a Windows setting.
In Windows 10, use the Privacy page to choose which apps can use a particular feature. Select Start  > Settings  > Privacy. Select the app and choose which app permissions are on or off. 

- Make sure that webcam has been correctly installed
- When using Windows 10: Make sure the webcam (and if applicable, its microphone) are allowed in the Privacy settings to be used by the application
- In order to use the webcam with a program, we would advise you to select the Trust webcam as the default video and audio recording device in the configuration menu from the software you are trying to use the webcam with.
- For more information, please refer to software’s user information or contact the manufacturer for specific troubleshooting, which is usually available via the website of the manufacturer.

We always try to keep our products functional for as long as possible. As a result of the quick succession of developments in this sector and the advanced age of the product, we are no longer able to keep it compatible with the frequent releases of new Windows 10 updates. One of which has resulted in this error message, that indicates that the system is preventing you from running an installation (.exe) file, such as a hardware driver.

This product isn't supported on Windows 10 due to its advanced age. Therefore there are no new driver updates available. Nor can we provide information on removing this error message. There are various solutions for this message posted on the internet, including in the Microsoft forum. Please note that these solutions are not official, as there is no driver update available and therefore are not supported, nor is proper functioning guaranteed.

Unfortunately, we do not have service centers to repair products.
A defective product should be replaced by your point of purchase during the warranty period.

We offer a 'return to retailer' warranty on our products. In case of a defect, you can return the product to your retailer with failure description, proof of purchase and all accessories. During the warranty period you will receive a replacement product from the retailer if available. For full warranty conditions you can consult: https://www.trust.com/support/warranty

We always try to keep our products functional for as long as possible.

As a result of the quick succession of developments in this sector and the age of some products, we are sometimes no longer able to keep products compatible with the frequent release of new operating systems.

Unfortunately, this is the case for this product.

Therefore there are no drivers available for Windows 10.

The technology used is no longer compatible with this operating system.

This webcam is not supported in Windows 8 camera app, but does work in Windows 8 using Windows Live messenger or Skype.