nRF52 USB CDC driver install fails in Windows 8.1 Pro

[Krishnarao]

Hi,

I am using nRF5_SDK_15.2.0_9412b96 SDK and dev board - PCA10056 V1.1.0 2019.22 - 683524107

USB serial driver is not detected on Windows 8.1 Pro while testing my customized CLI which is implemented based on USBD CDC ACM.
I tried to install the driver manually by following below steps, but nothing worked out.

1. Device Manager -> Other Devices -> Right click on "nRF52 USB Product" -> Select "Search automatically for updated driver software"
2. Device Manager -> Other Devices -> Right click on "nRF52 USB Product" -> Select "Browse my computer for driver software" -> Choose "nRF5_SDK_15.2.0_9412b96\examples\usb_drivers\nordic_cdc_acm.inf"
3. Device Manager -> Other Devices -> Right click on "nRF52 USB Product" -> Select "Browse my computer for driver software" -> Select "Let me pick from list of device drivers on my computer" -> Select "Universal Serial Bus Device" -> Select "Have a disk" -> Choose "nRF5_SDK_15.2.0_9412b96\examples\usb_drivers\nordic_cdc_acm.inf"

Could you please help me to resolve this USB driver issue on my Windows 8.1 Pro?

Thank you,
Krishna

[Edvin]

Hello,

Have you used the same DK with another USB example? Perhaps the computer has cached some old USB settings for that COM port that aren't compatible with the driver you are trying to use now?

Is it possible to test with either another computer or another DK to see if that is the issue? Alternatively, you can try to reset the COM ports. I am not entirely sure how to do this, but perhaps this thread is a good start.