Open the NetumScan Pro software, the device list is normal, but the preview screen is blank

Q: Open the NetumScan Pro software, the device list is normal, but the preview screen is blank

A:

1)Unplug and insert the USB cable of the camera, and connect the camera device to the back of the computer host.

2)If you have 360 or other anti-virus security software installed on your computer, you need to open the camera permission on the security software, or exit the security software.

3)Detect and repair your computer's DirectX environment using DirectX Repair Tool.

 DirectX Repair Tool: https://zhangyue667.lanzouh.com/DirectXRepairOnline