VirtualBox COM Server 4.2.12 r84980 win.amd64 (Apr 12 2013 11:35:06) release log
00:00:00.046000 main     Log opened 2013-06-03T08:20:24.881095500Z
00:00:00.046000 main     OS Product: Windows 7
00:00:00.046000 main     OS Release: 6.1.7601
00:00:00.046000 main     OS Service Pack: 1
00:00:00.202000 main     DMI Product Name: 2847DNG
00:00:00.218000 main     DMI Product Version: ThinkPad SL510
00:00:00.218000 main     Host RAM: 5980MB total, 4336MB available
00:00:00.218000 main     Executable: C:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
00:00:00.218000 main     Process ID: 5796
00:00:00.218000 main     Package type: WINDOWS_64BITS_GENERIC
00:00:00.218000          Loading settings file "C:\Users\DJT/.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:00.936000          usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:00:02.761000          VDInit finished
00:00:02.761000          Loading settings file "C:\Users\DJT\VirtualBox VMs\Ubuntu\Ubuntu.vbox" with version "1.12-windows"
00:00:02.761000          Loading settings file "C:\Users\DJT\VirtualBox VMs\Ubuntu 12.04\Ubuntu 12.04.vbox" with version "1.12-windows"
00:00:05.647000          ERROR [COM]: aRC=VBOX_E_INVALID_VM_STATE (0x80bb0002) aIID={22781af3-1c96-4126-9edf-67a020e0e858} aComponent={Machine} aText={Machine is not locked for session (session state: Unlocked)}, preserve=false
00:39:07.659000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:39:10.435000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:39:25.193000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:39:34.506000          ERROR [COM]: aRC=E_INVALIDARG (0x80070057) aIID={173b4b44-d268-4334-a00d-b6521c9a740a} aComponent={HostUSBDevice} aText={USB device 'samsung Nexus 10' with UUID {390c1d78-471a-40b9-94d0-727cfeae9591} is busy with a previous request. Please try again later}, preserve=false
00:39:41.183000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:39:55.083000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:39:55.208000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:40:09.357000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:40:09.825000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:40:11.073000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:40:15.425000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:40:16.486000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:42:14.470000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:42:21.100000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:43:01.847000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:43:14.546000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:43:14.655000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:43:24.967000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:43:27.743000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:47:19.140000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:47:21.979000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:47:30.434000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:47:30.434000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:47:33.507000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)
00:47:33.507000 USBPROXY usbLibDevCfgDrGet: DeviceIoControl 1 fail winEr (31)