Warning
Use an administrator account for these steps, and keep a recent backup before making repair or security changes.
What you will achieve
Run PowerShell scripts without opening the door to unsigned malware — scopes and signing explained.
1) Check current policy by scope
Get-ExecutionPolicy -List2) Use least-permissive option needed
For most admin/dev usage, set current user to RemoteSigned rather than Bypass:
Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy RemoteSigned3) Run one-off scripts safely
For a single trusted script, prefer temporary bypass in that process only.