virtualbox.org

First of all thanks for your great work.
Second I sure that the problem was already discussed I have read a lot but I'm not able to solve,

As write above I have installed in VB Win 8.1 the host is Win 8.1. All work well but I'm not able to use USB device. In Setting -> USB I have selected USB and USB 2.0 EHCI.
Add Filter Generic Mass Storage from list, when I try to connect it from Device -> Device USB I receive the following message:

Connessione del dispositivo USB Generic Mass Storage [0103] alla macchina virtuale Win_8.1 non riuscita.

USB device 'Generic Mass Storage' with UUID {d90e8f4c-d4ab-45e8-80d9-d7dcab360e3c} is busy with a previous request. Please try again later.

Codice 'uscita: E_INVALIDARG (0x80070057)
Componente: HostUSBDevice
Interfaccia: IHostUSBDevice {173b4b44-d268-4334-a00d-b6521c9a740a}
Chiamante: IConsole {8ab7c520-2442-4b66-8d74-4ff1e195d2b6}

I have try in different manners, for example I have removed the drive from Host, I have try to disconnect the pen etc. Without positive result.

numb3rs666 wrote:I sure that the problem was already discussed I have read a lot but I'm not able to solve

You are correct. Internet search could offer some great help.

socratis wrote:You are correct. could offer some great help.

Thanks but if you have the patience to read my post probably you can understand that I have tried a lot of ways but without positive results. I need, if possible, of a person that drive me step by step. Sorry I'm a novice.

numb3rs666 wrote:Sorry I'm a novice.

So am I . OK, here is my canned advice #6:

1. Create a USB filter in your guest settings while the device is plugged in the host. Delete all values except VendorID and ProductID.
2. Unplug the device.
3. Start your guest (the one that you applied the filter to). Let it start completely. Log in if you have to.
4. Plug your device. The filter should capture it and pass control to your guest.

and another one (which I recently was made aware of) if you're using AMD:
SOLVED: Failed to access the USB subsystem on Windows 7 host

First of all thannks for your interest.
I have tried the suggested procedure without result but now I have noted in the Host Device Managment that the VirtualBox USB Driver is not installed. Practically the guest capture the device but the driver is not installed. I will try with another device. For now I don't want that you spend more time I will take you informed.

Happy New Year

Edit sorry I have forget: in my PC is installed an Intel Processor.

numb3rs666 wrote:the VirtualBox USB Driver is not installed

Did you install the VBox application with right-click "Run as administrator"? Try that if you don't mind... And make sure that you relax the policies for unsigned drivers temporarily in your host.

Buon anno anche a te!!!

Thanks for your help the problem is solved. I have installed manually the Virtualbox USB Driver in the Host. The driver is present in the folder of VirtualBox.

Grazie e ancora Buona Fine ed un grande 2014