Yarn: the file yarn.ps1 cannot be loaded because running scripts is prohibited on this system.

yarn : Unable to load file D:\devtool\node\node_global\yarn.ps1, Because scripts are not allowed to run on this system . For more information , see also https:/go.microsoft.com/fwlink/?LinkID=135170 Medium about_Execut
ion_Policies.

npm install --global yarn

install yarn Hold this mistake when .

There is also such a hint ：

For more information , see also https:/go.microsoft.com/fwlink/?LinkID=135170 Medium about_Execut
ion_Policies.

Looked at the , Is probably powershell Security policy issues .

solve

Follow the instructions in the above article , Modify security policy ：

• open powershell, Open as administrator
• set-ExecutionPolicy RemoteSigned, choice Y
• get-ExecutionPolicy See if it's RemoteSigned

verification

npm install --global yarn

The successful running ~