id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host 4286,can't attach USB device,Torsten Rottmann,," I tried to attach an USB Kobil smartcard reader to a windows guest OS. VirtualBox complains about the device being used by someone else. (Which sounds like some process holding a lock on it to me) The detailed message is: Fehlercode: NS_ERROR_FAILURE (0x80004005) Komponente: HostUSBDevice Interface: IHostUSBDevice {173b4b44-d268-4334-a00d-b6521c9a740a} Callee: IConsole {9511bc54-15ee-4ddf-808e-472aba03809c} I also tried this with the ""Parallels Desktop"": There it works. Note: Attaching the device results also in an error reported on the MacOS console: USBF: 12675.455 AppleUSBUHCI[0x2bae000]::Found a transaction past the completion deadline on bus 0x1d, timing out! (Addr: 3, EP: 0) ",defect,closed,USB,VirtualBox 2.2.4,obsolete,,,Windows,Mac OS X