I tried to run the example on STM32F072-EVAL found in STMicroelectronics\STM32Cube_FW_F0_V1.9.0\Projects\STM32072B_EVAL\Applications\USB_Device\CDC_Standalone.
When I plug CN4 USB connector to my PC, I see a STMicroelectronics Virtual COM Port (COM3) appear but with an exclamation mark. I have the error code "This device cannot start. (Code 10))
My PC has Windows 10.
1) I tried to reinstall the drivers (even if it is not necessary for Windows 10)
2) I tried to increase the stack and the heap
3) I tried to change my bDeviceClass and bDeviceSubClass to 2
Unfortunately, I had no success with those modifications. Can somebody help me with that problem ?