You actually can even permanently modify it as a normal user. You need to be admin to run set-executionpolicy -Scope LocalMachine (which is the default) but you

You actually can even permanently modify it as a normal user. You need to be admin to run set-executionpolicy -Scope LocalMachine (which is the default) but you can run set-executionpolicy -Scope CurrentUser as a normal user. (This can be overridden by policies though.) Also, in windows 10 the default ExecutionPolicy changed from Windows 7 so by default you can run powershell scripts even without using -executionpolicy bypass.