由于某种原因，我无法弄清楚（因为我一直在调整虚拟机设置以尝试消除此错误，但没有成功）我的 Windows 7 和 10 虚拟机无法启动，并出现以下错误：
Failed to open a session for the virtual machine Windows <NO>.
The VM session was aborted.
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: SessionMachine
Interface: ISession {7844aa05-b02e-4cdd-a04f-ade4a762e6b7}
其中，<NO>Win7 为 7，Win10 为 10。尽管如此，我的 BSD、FreeDOS、Linux、Icaros、OpenIndiana 和 ReactOS VM 都启动良好。我已经尝试尽可能地遵循 Ask Ubuntu 上的这个答案（因为我认为 VirtualBox 已经从使用xml文件切换到使用vbox文件来存储配置设置）https://askubuntu.com/a/223763。换句话说，我删除了.vboxWindows 7 和 10 VM 的文件并转移.vbox-prev到.vbox.我也尝试过从 VirtualBox 5.1.18 升级到 5.1.20 后重新启动。如果相关的话，我的主机操作系统是 Gentoo Linux。
这是我的.vboxWindows 10 文件（如果相关）：
<?xml version="1.0"?>
<!--
** DO NOT EDIT THIS FILE.
** If you make changes to this file while any VirtualBox related application
** is running, your changes will be overwritten later, without taking effect.
** Use VBoxManage or the VirtualBox Manager GUI to make changes.
-->
<VirtualBox xmlns="http://www.virtualbox.org/" version="1.15-linux">
<Machine uuid="{25213a44-d63b-477e-a203-59635452c435}" name="Windows 10" OSType="Windows10_64" currentSnapshot="{67db068f-7287-4317-876b-b28a93a67d49}" snapshotFolder="Snapshots" lastStateChange="2017-04-21T16:56:07Z" aborted="true">
<MediaRegistry>
<HardDisks>
<HardDisk uuid="{e1dde417-5c02-461f-8bb1-167cd1fc6155}" location="Windows 10.vdi" format="VDI" type="Normal">
<HardDisk uuid="{b7e09ac5-2e76-44ea-85d1-f06f4539ef71}" location="Snapshots/{b7e09ac5-2e76-44ea-85d1-f06f4539ef71}.vdi" format="VDI"/>
</HardDisk>
</HardDisks>
</MediaRegistry>
<ExtraData>
<ExtraDataItem name="GUI/LastCloseAction" value="PowerOff"/>
<ExtraDataItem name="GUI/LastGuestSizeHint" value="1600,795"/>
<ExtraDataItem name="GUI/LastNormalWindowPosition" value="0,23,640,480,max"/>
<ExtraDataItem name="GUI/RestrictedRuntimeDevicesMenuActions" value="HardDrives"/>
<ExtraDataItem name="GUI/RestrictedRuntimeMachineMenuActions" value="SaveState,PowerOff"/>
<ExtraDataItem name="GUI/ScaleFactor" value="1"/>
<ExtraDataItem name="GUI/ShowMiniToolBar" value="false"/>
<ExtraDataItem name="GUI/StatusBar/IndicatorOrder" value="HardDisks,OpticalDisks,FloppyDisks,Network,USB,SharedFolders,Display,VideoCapture,Features,Mouse,Keyboard"/>
</ExtraData>
<Snapshot uuid="{67db068f-7287-4317-876b-b28a93a67d49}" name="Snapshot 1" timeStamp="2017-02-24T11:04:25Z">
<Hardware>
<CPU>
<PAE enabled="false"/>
<LongMode enabled="true"/>
<HardwareVirtExLargePages enabled="false"/>
</CPU>
<Memory RAMSize="4096"/>
<HID Pointing="USBTablet"/>
<Paravirt provider="Default"/>
<Boot>
<Order position="1" device="Floppy"/>
<Order position="2" device="DVD"/>
<Order position="3" device="HardDisk"/>
<Order position="4" device="Network"/>
</Boot>
<Display VRAMSize="128"/>
<RemoteDisplay enabled="false"/>
<BIOS>
<IOAPIC enabled="true"/>
</BIOS>
<USB>
<Controllers>
<Controller name="OHCI" type="OHCI"/>
</Controllers>
</USB>
<Network>
<Adapter slot="0" enabled="true" MACAddress="080027BC7597" cable="true" type="82540EM">
<NAT/>
</Adapter>
<Adapter slot="1" cable="true" type="82540EM"/>
<Adapter slot="2" cable="true" type="82540EM"/>
<Adapter slot="3" cable="true" type="82540EM"/>
<Adapter slot="4" cable="true" type="82540EM"/>
<Adapter slot="5" cable="true" type="82540EM"/>
<Adapter slot="6" cable="true" type="82540EM"/>
<Adapter slot="7" cable="true" type="82540EM"/>
</Network>
<LPT>
<Port slot="1" enabled="false" IOBase="0x378" IRQ="7"/>
</LPT>
<AudioAdapter controller="HDA" driver="ALSA" enabled="true"/>
<Clipboard mode="Bidirectional"/>
<DragAndDrop mode="Bidirectional"/>
<GuestProperties>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxControl.exe" value="5.1.14r112924" timestamp="1487831742829894000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxCredProv.dll" value="-" timestamp="1487831744274180000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxDisp.dll" value="-" timestamp="1487831742830753000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxGINA.dll" value="-" timestamp="1487831744274045000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxGuest.sys" value="5.1.14r112924" timestamp="1487831746441185000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxHook.dll" value="5.1.14r112924" timestamp="1487831742830648000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxMRXNP.dll" value="5.1.14r112924" timestamp="1487831744273852000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxMouse.sys" value="5.1.14r112924" timestamp="1487831746441474000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGL.dll" value="-" timestamp="1487831744275106000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLarrayspu.dll" value="-" timestamp="1487831744274402000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLcrutil.dll" value="-" timestamp="1487831744274571000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLerrorspu.dll" value="-" timestamp="1487831744274708000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLfeedbackspu.dll" value="-" timestamp="1487831744275013000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLpackspu.dll" value="-" timestamp="1487831744274821000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLpassthroughspu.dll" value="-" timestamp="1487831744274917000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxSF.sys" value="5.1.14r112924" timestamp="1487831746441767000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxService.exe" value="5.1.14r112924" timestamp="1487831743683193000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxTray.exe" value="5.1.14r112924" timestamp="1487831743682974000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxVideo.sys" value="-" timestamp="1487831746441894000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/HostVerLastChecked" value="5.1.14" timestamp="1487831838478188000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/InstallDir" value="C:/Program Files/Oracle/VirtualBox Guest Additions" timestamp="1487831742828693000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Revision" value="112924" timestamp="1487831742828608000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Version" value="5.1.14" timestamp="1487831742828329000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/VersionExt" value="5.1.14" timestamp="1487831742828545000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/MAC" value="080027BC7597" timestamp="1487831746445655000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/Status" value="Up" timestamp="1487831746445600000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/Broadcast" value="255.255.255.255" timestamp="1487831746445479000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/IP" value="10.0.2.15" timestamp="1487831746445410000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/Netmask" value="255.255.255.0" timestamp="1487831746445529000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/Count" value="1" timestamp="1487845608970464000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/OS/Product" value="Windows 10" timestamp="1487831742825086000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/OS/Release" value="10.0.14393" timestamp="1487831742826066000" flags=""/>
<GuestProperty name="/VirtualBox/HostInfo/GUI/LanguageID" value="en_US" timestamp="1487845616040441000" flags=""/>
</GuestProperties>
</Hardware>
<StorageControllers>
<StorageController name="SATA" type="AHCI" PortCount="3" useHostIOCache="false" Bootable="true" IDE0MasterEmulationPort="0" IDE0SlaveEmulationPort="1" IDE1MasterEmulationPort="2" IDE1SlaveEmulationPort="3">
<AttachedDevice type="HardDisk" hotpluggable="false" port="0" device="0">
<Image uuid="{e1dde417-5c02-461f-8bb1-167cd1fc6155}"/>
</AttachedDevice>
<AttachedDevice passthrough="false" type="DVD" hotpluggable="false" port="1" device="0"/>
</StorageController>
</StorageControllers>
</Snapshot>
<Hardware>
<CPU count="3">
<PAE enabled="false"/>
<LongMode enabled="true"/>
<HardwareVirtExLargePages enabled="false"/>
</CPU>
<Memory RAMSize="8192"/>
<HID Pointing="USBTablet"/>
<Paravirt provider="Default"/>
<Boot>
<Order position="1" device="Floppy"/>
<Order position="2" device="DVD"/>
<Order position="3" device="HardDisk"/>
<Order position="4" device="Network"/>
</Boot>
<Display VRAMSize="128" accelerate3D="true"/>
<RemoteDisplay enabled="false">
<VRDEProperties>
<Property name="TCP/Ports" value="3389"/>
</VRDEProperties>
</RemoteDisplay>
<BIOS>
<IOAPIC enabled="true"/>
</BIOS>
<USB>
<Controllers>
<Controller name="OHCI" type="OHCI"/>
</Controllers>
</USB>
<Network>
<Adapter slot="0" enabled="true" MACAddress="080027BC7597" cable="true" type="82540EM">
<NAT/>
</Adapter>
<Adapter slot="1" cable="true" type="82540EM"/>
<Adapter slot="2" cable="true" type="82540EM"/>
<Adapter slot="3" cable="true" type="82540EM"/>
<Adapter slot="4" cable="true" type="82540EM"/>
<Adapter slot="5" cable="true" type="82540EM"/>
<Adapter slot="6" cable="true" type="82540EM"/>
<Adapter slot="7" cable="true" type="82540EM"/>
</Network>
<LPT>
<Port slot="1" enabled="false" IOBase="0x378" IRQ="7"/>
</LPT>
<AudioAdapter controller="HDA" driver="ALSA" enabled="true"/>
<SharedFolders>
<SharedFolder name="Programs" hostPath="/home/fusion809/Programs" writable="true" autoMount="true"/>
<SharedFolder name="Documents" hostPath="/home/fusion809/Documents" writable="true" autoMount="true"/>
</SharedFolders>
<Clipboard mode="Bidirectional"/>
<DragAndDrop mode="Bidirectional"/>
<GuestProperties>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxControl.exe" value="5.1.14r112924" timestamp="1492704560791453000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxCredProv.dll" value="-" timestamp="1492704560794626000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxDisp.dll" value="-" timestamp="1492704560792313000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxGINA.dll" value="-" timestamp="1492704560794535000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxGuest.sys" value="5.1.14r112924" timestamp="1492704560795853000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxHook.dll" value="5.1.14r112924" timestamp="1492704560792200000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxMRXNP.dll" value="5.1.14r112924" timestamp="1492704560794427000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxMouse.sys" value="5.1.14r112924" timestamp="1492704560796087000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGL.dll" value="-" timestamp="1492704560795257000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLarrayspu.dll" value="-" timestamp="1492704560794758000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLcrutil.dll" value="-" timestamp="1492704560794847000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLerrorspu.dll" value="-" timestamp="1492704560794930000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLfeedbackspu.dll" value="-" timestamp="1492704560795177000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLpackspu.dll" value="-" timestamp="1492704560795014000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLpassthroughspu.dll" value="-" timestamp="1492704560795097000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxSF.sys" value="5.1.14r112924" timestamp="1492704560796309000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxService.exe" value="5.1.14r112924" timestamp="1492704560793480000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxTray.exe" value="5.1.14r112924" timestamp="1492704560793367000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxVideo.sys" value="-" timestamp="1492704560796407000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/HostVerLastChecked" value="5.1.20" timestamp="1492704701391273000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/InstallDir" value="C:/Program Files/Oracle/VirtualBox Guest Additions" timestamp="1492704560790219000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Revision" value="112924" timestamp="1492704560790140000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/Version" value="5.1.14" timestamp="1492704560788816000" flags=""/>
<GuestProperty name="/VirtualBox/GuestAdd/VersionExt" value="5.1.14" timestamp="1492704560789204000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/MAC" value="080027BC7597" timestamp="1492704560799558000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/Status" value="Up" timestamp="1492704560799509000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/Broadcast" value="255.255.255.255" timestamp="1492704560799413000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/IP" value="10.0.2.15" timestamp="1492704560799350000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/Netmask" value="255.255.255.0" timestamp="1492704560799461000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/Net/Count" value="1" timestamp="1492705372643822000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/OS/Product" value="Windows 10" timestamp="1492704560787466000" flags=""/>
<GuestProperty name="/VirtualBox/GuestInfo/OS/Release" value="10.0.14393" timestamp="1492704560788182000" flags=""/>
<GuestProperty name="/VirtualBox/HostInfo/GUI/LanguageID" value="en_US" timestamp="1492711972365764000" flags=""/>
</GuestProperties>
</Hardware>
<StorageControllers>
<StorageController name="SATA" type="AHCI" PortCount="3" useHostIOCache="false" Bootable="true" IDE0MasterEmulationPort="0" IDE0SlaveEmulationPort="1" IDE1MasterEmulationPort="2" IDE1SlaveEmulationPort="3">
<AttachedDevice type="HardDisk" hotpluggable="false" port="0" device="0">
<Image uuid="{b7e09ac5-2e76-44ea-85d1-f06f4539ef71}"/>
</AttachedDevice>
<AttachedDevice passthrough="false" type="DVD" hotpluggable="false" port="1" device="0"/>
</StorageController>
</StorageControllers>
<Groups>
<Group name="/Windows NT"/>
</Groups>
</Machine>
</VirtualBox>
事实证明这是一个错误，降级到 5.1.18 完美修复了该错误。我已经在 Gentoo Bugzilla 报告了这个错误https://bugs.gentoo.org/show_bug.cgi?id=616238。
编辑：从命令行开始给出了不再详细的输出。即从以下开始：
VBoxManage startvm "Windows 10" --type headless
失败并出现错误：
Waiting for VM "Windows 10" to power on...
VBoxManage: error: The VM session was aborted
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component SessionMachine, interface ISession