virtualbox.org

Hello,

I installed the VirtualBox update 4.1.20 r80170 last night and I can no longer mount external USB drives on my Windows 7 VM.

Host:
- MacBook Pro 15-inch Retina, 2.7 GHz quad core i7, 16GB ram, 768GB drive
- OS X 10.8.1

Guest:
- 2 core, 4GB ram, 100GB dynamically allocated disk
- Windows 7 Ultimate will all current updates

USB Drives that won't mount in Windows 7 VM, but work fine on Mac and on Bootcamp Windows 7 Home Premium boot:
- Cruzer Micro 16GB thumb drive
- Cruzer Micro 32GB thumb drive
- Western Digital My Passport 750GB drive formatted as exFAT with latest firmware installed and SmartWare disabled
- Western Digital My Passport 250GB drive formatted as exFAT with latest firmware installed and SmartWare disabled

The drivers are listed as installed when looking under Computer->Manage->Device Manager, but the device status is "This device cannot start. (Code 10)".

The drives had mounted/worked in the VM just fine prior to the update to 4.1.20.

I saw some similar items in the forums, but none seemed relevant to the 4.1.20 update.

Thanks
Bob Blackard

Did you also update the Extension Pack?

I had the previous version installed. I downloaded the latest and installed it, shut down the Windows VM, exited and restarted VirtualBox Manager, started the Windows VM and retested.

Same result. I even uninstalled the old driver using Device Manager in Windows, restarted, and even though it recognized the device and installed the driver again, the same result... "This device cannot start. (Code 10)"

Sorry, that's a long way to say yes, but I wanted to cover questions I might have asked next.