Update README.md

Author: andylytical

README.md

@@ -1,6 +1,8 @@
 # Windows Powershell Profile
 
 # Installation
+- Powershell (as Administrator)
+  - `Set-ExecutionPolicy RemoteSigned`
 - Powershell (as normal user)
   - `get-item $profile | rename-item -newname { $_.Name -replace 'ps1',(Get-Date -Format yyyyMMdd-HHmmss) } -whatif`
   - `Invoke-WebRequest -outfile $profile https://raw.githubusercontent.com/andylytical/powershell/master/Microsoft.PowerShell_profile.ps1`