Set-ExecutionPolicy Unrestricted
但我明白了：
Set-ExecutionPolicy : 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 RemoteSigned. Type "Get-ExecutionPolicy -List"
to view your execution policy settings. For more information please see
"Get-Help Set-ExecutionPolicy".
At line:1 char:1
+ Set-ExecutionPolicy Unrestricted
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : PermissionDenied: (:) [Set-ExecutionPolicy],SecurityException
+ FullyQualifiedErrorId : ExecutionPolicyOverride,Microsoft.PowerShell.Commands.SetExecutionPolicyCommand
虽然我是管理员，但我无法更改执行政策。该怎么办？
PS C:\> Get-ExecutionPolicy -List
Scope ExecutionPolicy
----- ---------------
MachinePolicy Undefined
UserPolicy Undefined
Process Undefined
CurrentUser Undefined
LocalMachine RemoteSigned
PS C:\> Set-ExecutionPolicy Restricted -Scope Process -Force
PS C:\> Set-ExecutionPolicy Unrestricted -Scope CurrentUser -Force
Set-ExecutionPolicy : 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 Restricted. Type "Get-ExecutionPolicy -List" to view your execution policy settings. ...
PS C:\> Get-ExecutionPolicy -List
Scope ExecutionPolicy
----- ---------------
MachinePolicy Undefined
UserPolicy Undefined
Process Restricted
CurrentUser Unrestricted
LocalMachine RemoteSigned
PS C:\> .\test.ps1
.\test.ps1 : File C:\test.ps1 cannot be loaded because running scripts is disabled on this system. ...
PS C:\> Set-ExecutionPolicy Unestricted -Scope Process -Force
PS C:\> Set-ExecutionPolicy Restricted -Scope CurrentUser -Force
Set-ExecutionPolicy : Windows PowerShell updated your execution policy successfully,your shell will retain its current effective execution policy of Restricted. Type "Get-ExecutionPolicy -List" to view your execution policy settings. ...
PS C:\> Get-ExecutionPolicy -List
Scope ExecutionPolicy
----- ---------------
MachinePolicy Undefined
UserPolicy Undefined
Process Unrestricted
CurrentUser Restricted
LocalMachine RemoteSigned
PS C:\> .\test.ps1
Hello World!
正如您所看到的，尽管存在错误，但两个设置都已定义，但更具体范围(Process)中的设置仍然优先，阻止或允许脚本执行。
由于默认范围是LocalMachine，因此错误可能是由CurrentUser或Process范围中的设置引起的。但是，更常见的原因是脚本执行是通过组策略(本地或域)配置的。
本地管理员可以通过gpedit.msc(本地组策略编辑器)修改本地组策略，如this answer中所述。
域组策略不能被本地设置/策略取代，并且必须由域管理员通过域控制器上的gpmc.msc(组策略管理)进行更改。
对于本地和域策略，可以将设置定义为计算机设置：
Computer Configuration
`-Administrative Templates
`-Windows Components
`-Windows PowerShell -> Turn on Script Execution
或作为用户设置：
User Configuration
`-Administrative Templates
`-Windows Components
`-Windows PowerShell -> Turn on Script Execution
前者适用于计算机对象，后者适用于用户对象。对于本地策略，用户和计算机策略之间没有显着差异，因为用户策略会自动应用于计算机上的所有用户。
策略可以具有三种状态之一(如果计算可用于单独启用状态的3种设置，则为五种状态)：
>未配置：策略不控制PowerShell脚本执行。
>已启用：允许PowerShell脚本执行。
>仅允许签名脚本：仅允许执行签名脚本(与Set-ExecutionPolicy AllSigned相同)。
>允许本地脚本和远程签名脚本：允许从远程位置执行所有本地脚本(已签名或未签名)和签名脚本(与Set-ExecutionPolicy RemoteSigned相同)。
>允许所有脚本：允许执行本地和远程脚本，无论它们是否已签名(与Set-ExecutionPolicy Unrestricted相同)。
>已禁用：禁止PowerShell脚本执行(与Set-ExecutionPolicy Restricted相同)。
通过Set-ExecutionPolicy进行的更改仅在本地和域策略设置为“未配置”(执行策略未在范围MachinePolicy和UserPolicy中定义)时生效。
