I recently built a new PC and did a clean Windows 10 install. As a result, I had to reinstall VSCode and everything else. I use PowerShell as my prefered shell in VSCode and encountered an error I sort of remember from when I did my last fresh install.
The error in my case reads File C:\Users\dwayn\AppData\Roaming\npm\yarn.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at https:/go.microsoft.com/fwlink/?LinkID=135170.
Your error might differ from mine, but I was trying to globally install Yarn via Npm and then run it. To fix the issue, it’s quite simple.
Open up a PowerShell terminal and run it as an administrator (right-click, run as administrator) and run the following command:
Set-ExecutionPolicy –ExecutionPolicy RemoteSigned
It’ll give you a warning and ask if you want to change the execution policy, enter A to answer yes to all. That’s it, that should now all you to run Node packages that have been installed globally and fix any other issues around the building of packages.