vista/win7
管理员身份打开cmd执行安装telnet客户端的命令
pkgmgr /iu:"TelnetClient"
安装：start /w pkgmgr /iu:"TelnetClient"
卸载：start /w pkgmgr /uu:"TelnetClient"
Win8/8.1/10/11
管理员身份打开powershell执行命令
查看：Get-WindowsOptionalFeature -Online -FeatureName "TelnetClient"
启用：Enable-WindowsOptionalFeature -Online -FeatureName "TelnetClient"
禁用：Disable-WindowsOptionalFeature -Online -FeatureName "TelnetClient"
Win11用pkgmgr /iu:"TelnetClient" 来安装telnet客户端，回车后可能有个弹窗，点“是”就重启机器了，
Server 2012/2012R2/2016/2019/2022
管理员身份打开powershell执行命令
查看：Get-WindowsFeature -name "Telnet-Client"
启用：Install-windowsfeature -name "Telnet-Client"
禁用：Uninstall-windowsfeature -name "Telnet-Client"
Server 2008R2
如图，Add Feature → 选Telnet Client即可安装，要卸载反其道而行之
或者管理员身份打开powershell/cmd执行命令
servermanagercmd -install telnet-client
servermanagercmd -remove telnet-client
