![Finally got serial ports working, win7 host, if you have "Failed to attach the USB device (E_INVALIDARG)" issues then try deleting this win7 registry key, fixed mine. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056 ... Finally got serial ports working, win7 host, if you have "Failed to attach the USB device (E_INVALIDARG)" issues then try deleting this win7 registry key, fixed mine. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056 ...](https://external-preview.redd.it/R6D416r_3MRxLJzYQpNrBMsWKtbYzrIraHlNKY-o6TE.jpg?auto=webp&s=a50e29c515203c728f1f2fe89c51b0cf8e8f3403)
Finally got serial ports working, win7 host, if you have "Failed to attach the USB device (E_INVALIDARG)" issues then try deleting this win7 registry key, fixed mine. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{36FC9E60-C465-11CF-8056 ...
![Connect an USB key to a VirtualBox 6.0 / 5.2 virtual machine - Virtualization - Tutorials - InformatiWeb Connect an USB key to a VirtualBox 6.0 / 5.2 virtual machine - Virtualization - Tutorials - InformatiWeb](https://us.informatiweb.net/images/tutoriels/logos/us/virtualbox-connect-an-usb-key-to-a-vm.jpg)
Connect an USB key to a VirtualBox 6.0 / 5.2 virtual machine - Virtualization - Tutorials - InformatiWeb
![How to solve VirtualBox exception when attaching a USB device: failed to create a proxy device for the usb device. (error verr_pdm_no_usb_ports) | Our Code World How to solve VirtualBox exception when attaching a USB device: failed to create a proxy device for the usb device. (error verr_pdm_no_usb_ports) | Our Code World](https://cdn.ourcodeworld.com/public-media/gallery/gallery-5f235118d9758.png)
How to solve VirtualBox exception when attaching a USB device: failed to create a proxy device for the usb device. (error verr_pdm_no_usb_ports) | Our Code World
![How to solve VirtualBox exception when attaching a USB device: failed to create a proxy device for the usb device. (error verr_pdm_no_usb_ports) | Our Code World How to solve VirtualBox exception when attaching a USB device: failed to create a proxy device for the usb device. (error verr_pdm_no_usb_ports) | Our Code World](https://ourcodeworld.com/public-media/articles/articleocw-5f234a0b85366.jpg)