After download and trying so many software and driver for Acer Aspire 4738Z Windows 7 webcam. At last we find the solutions.
- Go to Acer website and choose download sections.
- Don't choose Acer Aspire 4738Z but choose Acer Aspire 4739Z.
- Pick your prefered version of Windows 7 and choose 'Application' tab.
- Download Camera Cyberlink Webcam Application version 1.0.1424.
- After finish download, install as usual and restart your windows.
Walla! Now you can use your camera.
If you have any problem please mention it on the comment below.


thank you bro, it works ^^