I downloaded SDK 2.4.2 for the K64 (USB & FreeRTOS) and built `usb_device_cdc_vcom`. When plugged in to a Windows 7 Professional machine I see `MCU VIRTUAL COM DEMO` in the device manager. When I follow the steps in the README PDF I get:
Windows found driver software for your device but encountered an error while attempting to install it.
Virtual Com Port
Access is denied.
I've checked permissions (owned by me and I'm an administrator). If I double click `cdc.cat` it claims that it is valid. I thought it might be related to digital signing but I'm not getting error to that effect.
Hoping to use this for a production device and it'd be nice to not use an FTDI chip + UART.