我已经愉快地使用vscode/angular/node/npm很多年了，没有任何问题。突然在过去的一个小时左右，我没有显式地修改任何东西，我得到了下面的错误。

导致先前存在的执行权限突然丢失的最可能原因是什么？

• 我讨厌提前说这些，但对于那些无法理解的人，我不是在问如何修复错误。我是在问为什么我的权限被擦除，导致它出现。*

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PS C:\Users\d> cd C:\source\my-WebApp
PS C:\source\my-WebApp> ng serve
ng : File C:\Users\d\AppData\Roaming\npm\ng.ps1 cannot be loaded. The file
C:\Users\d\AppData\Roaming\npm\ng.ps1 is not digitally signed. You cannot run this script on the current system.
For more information about running scripts and setting execution policy, see about_Execution_Policies at
https:/go.microsoft.com/fwlink/?LinkID=135170.
At line:1 char:1
+ ng serve
+ ~~
    + CategoryInfo          : SecurityError: (:) [], PSSecurityException
    + FullyQualifiedErrorId : UnauthorizedAccess
PS C:\source\my-WebApp>

显然，这就是解决办法：PS C：\source\我的Web应用〉获取执行策略列表

Scope ExecutionPolicy
        ----- ---------------
MachinePolicy       Undefined
   UserPolicy       Undefined
      Process       Undefined
  CurrentUser       Undefined
 LocalMachine       AllSigned

PS C:\source\my-WebApp> set-ExecutionPolicy RemoteSigned -Scope CurrentUse

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
https:/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
PS C:\source\my-WebApp> Get-ExecutionPolicy -list

        Scope ExecutionPolicy
        ----- ---------------
MachinePolicy       Undefined
   UserPolicy       Undefined
      Process       Undefined
  CurrentUser    RemoteSigned
 LocalMachine       AllSigned