Scripts

This repo contains the following script

Upgrade-PowerShell.ps1

The Upgrade-PowerShell.ps1 script is used to upgrade the installed version of PowerShell on a Windows host to a newer version.

jborean did an excellent job with this script :D

This script can be run on the following hosts

• Windows Server 2008 (with SP2 installed)
• Windows Server 2008 R2 (with SP1 installed)
• Windows Server 2012
• Windows Server 2012 R2
• Windows Server 2016
• Windows 7 (with SP1 installed)
• Windows 8.1
• Windows 10

When calling the script, the -Version parameter is used to specify the target PowerShell version to install. The versions that can be set as the target are:

• 3.0
• 4.0
• 5.1 (default if not set)

All OS' can be upgraded to 5.1 except for Windows Server 2008. If running on Powershell 1.0 then this script will first upgrade the version to 2.0 before running the checks. This is because a lot of the upgrade paths need this version installed as a baseline. If the .NET Framework version installed is less than 4.5.2, it will be upgraded to 4.5.2 as this is supported on all hosts and is required for v5.0.

As multiple packages can be installed in this process, multiple reboots may be required to continue with the install. If a reboot is required the script will detect if the 'username' and 'password' parameters have been supplied. Those credentials are needed for silent operation.

If they have been supplied it will automatically reboot and login to continue the install process until it is all complete. If these parameters are not set then it will just reboot and continue once the user has logged back in manually before continuing.

A log of this process is created in $env:SystemDrive\temp\upgrade_powershell.log which is usually C:\temp\. This log can used to see how the script ran after an automatic reboot.

To run this script from any version of PowerShell, the following commands can be run

$url = "https://raw.githubusercontent.com/jborean93/ansible-windows/master/scripts/Upgrade-PowerShell.ps1"
$file = "$env:SystemDrive\temp\Upgrade-PowerShell.ps1"
$username = "Administrator"
$password = "Password"

(New-Object -TypeName System.Net.WebClient).DownloadFile($url, $file)
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Force

# version can be 3.0, 4.0 or 5.1
&$file -Version 5.1 -Username $username -Password $password -Verbose

When setting username or password, these values are stored in plaintext in the registry until the script is complete. Be sure to run the script below to clear them out.

# this isn't needed but is a good security practice to complete
Set-ExecutionPolicy -ExecutionPolicy Restricted -Force

$reg_winlogon_path = "HKLM:\Software\Microsoft\Windows NT\CurrentVersion\Winlogon"
Set-ItemProperty -Path $reg_winlogon_path -Name AutoAdminLogon -Value 0
Remove-ItemProperty -Path $reg_winlogon_path -Name DefaultUserName -ErrorAction SilentlyContinue
Remove-ItemProperty -Path $reg_winlogon_path -Name DefaultPassword -ErrorAction SilentlyContinue