Hyper-V是微软的一款虚拟化技术，是微软第一个采用类似Vmware和Citrix开源Xen一样的基于hypervisor的技术。
在Windows 10的powershell命令里，输入如下的命令行：Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
遇到如下错误信息：
Enable-WindowsOptionalFeature : Enable-WindowsOptionalFeature failed. Error code = 0x800f0831
Microsoft-Hyper-V Error code = 0x800f0831
At line:1 char:1
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Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V ...
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CategoryInfo : NotSpecified: (😃 [Enable-WindowsOptionalFeature], COMException
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FullyQualifiedErrorId : Microsoft.Dism.Commands.EnableWindowsOptionalFeatureCommand
再试试第二个命令行：
dism /online /enable-feature /featurename:microsoft-hyper-v-all /All
还是遇到错误码0x800f0831:
The DISM log file can be found at C:WINDOWSLogsDISMdism.log
解决办法是，进入Windows 10的控制面板，在Turn windows features on or off里先安装.NET Framework:
之后就能安装Hyper-V了。
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