重置VMware PowerCLI全局：DefaultVIServer和全局：DefaultVIServers系统variables？

任何人都可以在这里协助我重置全局：DefaultVIServer和全局：DefaultVIServers系统variables为$ null？

因为即使重新安装PowerCLi并将其升级到5.1U2之后，我也无法再使用PowerShell执行任何操作，以下是版本信息和configuration信息的输出：

Scope ProxyPolicy DefaultVIServerMode InvalidCertificateAction DisplayDeprecationWarnings WebOperationTimeoutSeconds ----- ----------- ------------------- ------------------------ -------------------------- -------------------------- Session UseSystemProxy Multiple Unset True 300 User UseSystemProxy Multiple AllUsers Single WARNING: Error initializing default drive: 'Unable to find a default server with Active Directory Web Services running.'. PowerCLI Version ---------------- VMware vSphere PowerCLI 5.1 Release 2 build 1012425 --------------- Snapin Versions --------------- VMWare AutoDeploy PowerCLI Component 5.1 build 768137 VMWare ImageBuilder PowerCLI Component 5.1 build 768137 VMware License PowerCLI Component 5.1 build 669840 VMware VDS PowerCLI Component 5.1 build 1012428 VMware vSphere PowerCLI Component 5.1 build 1012428 

由于这个错误，我甚至不能发出一个简单的PowerCLi命令来获取我的虚拟机列表，看到以下错误：

 WARNING: Error initializing default drive: 'Unable to find a default server with Active Directory Web Services running.'. Get-VM : You have modified the global:DefaultVIServer and global:DefaultVIServers system variables. This is not allowed. Please reset them to $null and reconnect to the vSphere server. At C:\Users\Albert\AppData\Local\Temp\4a44b139-36b2-4045-bf3c-a51cff5472b4.ps1:1 char:7 + Get-VM <<<< + CategoryInfo : NotSpecified: (:) [Get-VM], InvalidState + FullyQualifiedErrorId : VMware.VimAutomation.ViCore.Types.V1.ErrorHandling.InvalidState,VMware.VimAutomation.ViCore.Cmdlets.Commands.GetVM 

任何帮助将不胜感激。

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谢谢

名称值
 ---- -----
全球：DefaultVIServer         
全球：DefaultVIServers {}