执行Get-BpaModel遇执行策略覆盖错误，求解决方案

问题现象 #

运行Get-BpaModel命令时触发执行策略覆盖错误，具体报错如下：

Get-BpaModel : There has been an error while trying to set the process wide execution policy. (Inner Exception:
Windows PowerShell updated your execution policy successfully, but the setting is overridden by a policy defined at a
more specific scope. Due to the override, your shell will retain its current effective execution policy of
Unrestricted. Type "Get-ExecutionPolicy -List" to view your execution policy settings. For more information please see
"Get-Help Set-ExecutionPolicy".)
At line:1 char:1

• Get-BpaModel

• + CategoryInfo          : NotSpecified: (:) [Get-BpaModel], CommandLetException
    + FullyQualifiedErrorId : SetExecutionPolicyError,Microsoft.BestPractices.Cmdlets.GetModelCommand
  

当前执行策略配置 #

执行Get-ExecutionPolicy系列命令结果：

PS C:\Windows\system32> Get-ExecutionPolicy
Unrestricted
PS C:\Windows\system32> Get-ExecutionPolicy -list

        Scope ExecutionPolicy
        ----- ---------------
MachinePolicy    Unrestricted
   UserPolicy    Unrestricted
      Process    RemoteSigned
  CurrentUser          Bypass
 LocalMachine    Unrestricted

已尝试操作 #

先执行Set-ExecutionPolicy Unrestricted再调用Get-BpaModel，仍触发相同错误：

PS C:\Windows\system32> Set-ExecutionPolicy Unrestricted | Get-BpaModel


Execution Policy Change
The execution policy helps protect you from scripts that you do not trust. Changing the execution policy might expose
you to the security risks described in the about_Execution_Policies help topic at
http://go.microsoft.com/fwlink/?LinkID=135170. Do you want to change the execution policy?
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "N"): y
Get-BpaModel : There has been an error while trying to set the process wide execution policy. (Inner Exception:
Windows PowerShell updated your execution policy successfully, but the setting is overridden by a policy defined at a
more specific scope.  Due to the override, your shell will retain its current effective execution policy of
Unrestricted. Type "Get-ExecutionPolicy -List" to view your execution policy settings. For more information please see
"Get-Help Set-ExecutionPolicy".)
At line:1 char:36
+ Set-ExecutionPolicy Unrestricted | Get-BpaModel
+                                    ~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Get-BpaModel], CommandLetException
    + FullyQualifiedErrorId : SetExecutionPolicyError,Microsoft.BestPractices.Cmdlets.GetModelCommand

GPO配置情况 #

From the GPO:
Policy
Setting
Winning GPO
Turn on Script Execution
Enabled
Default Domain Policy
Execution Policy Allow all scripts

解决办法 #

方法1：启动PowerShell时指定执行策略 #

打开命令提示符，运行以下命令启动PowerShell会话，直接指定Process级执行策略为Unrestricted：

powershell.exe -ExecutionPolicy Unrestricted

在新会话中执行Get-BpaModel，此时Process级策略与GPO的MachinePolicy一致，可避免内部设置时的覆盖冲突。

方法2：统一低优先级Scope的执行策略 #

将CurrentUser和LocalMachine级的执行策略设置为Unrestricted，确保与GPO策略一致：

Set-ExecutionPolicy Unrestricted -Scope CurrentUser -Force
Set-ExecutionPolicy Unrestricted -Scope LocalMachine -Force

执行后重启PowerShell会话，再运行Get-BpaModel测试。

方法3：刷新GPO并验证配置 #

强制刷新组策略，确保GPO设置生效：

gpupdate /force

重启PowerShell会话后重新执行Get-BpaModel。

内容的提问来源于stack exchange，提问作者Boolog