Netcam studio cannot see USB camera

Just installed Netcam Studio on windows 10 64 bit but I cannot see listed on the cameras the PC usb camera

Hi Giuseppe and welcome to NCS and the forum!
I am not sure if I understand you correct, but when you add a USB camera in NCS you use the tab Local Source/Webcam as shown in the picture below. In the picture the Source is the camera in my PC.

Some older USB Camera drivers are only in 32-bit and will only be visible when using Netcam Studio 32-bit version