In order to fix the problem, access Acer Download Center, identify your computer model, select your operating system and download the latest webcam files. After that, press Windows + R key combination, type devmgmt.msc and click OK. Expand the Imaging Devices list, right-click on the webcam driver and select Update Driver Software. Use the Browse option to navigate to the downloaded package, select the driver and install it following the on-screen instructions. If the issue persists, I recommend you contact Acer Support team.