Windows 11 Upgrade Script

Overview

This PowerShell script automates the execution of the Windows 11 Installation Assistant to silently upgrade devices to Windows 11. It is designed for seamless deployment with an MDM solution like SOTI MobiControl, enabling bulk upgrades across multiple devices while ensuring proper logging and error handling. The script is also compatible with manual execution using Task Scheduler or PowerShell.

Why Use This Script?

Organizations face challenges upgrading devices to Windows 11 at scale:

• Time-Consuming: Manual upgrades require significant effort.
• Compatibility Concerns: Ensuring hardware compatibility across devices.
• End-User Disruption: Minimizing interruptions to user workflows.
• Automation Needs: Leveraging MDM solutions to push upgrades remotely.

Benefits of This Script:

1. Streamlined Process: Automates the upgrade workflow using the Windows 11 Installation Assistant.
2. Reduced Manual Effort: Deploy and execute scripts via SOTI or Task Scheduler.
3. Centralized Logging: Provides clear logs for troubleshooting issues.

Pre-Requisites

1. Windows 11 Hardware Compatibility: Ensure devices meet Windows 11 system requirements.
2. Installation Assistant: Place Windows11InstallationAssistant.exe at C:\Users\Public\Downloads. The script will launch it from that path.
3. PowerShell Execution Policy: Use the following to bypass restrictions if needed:

   powershell.exe -ExecutionPolicy Bypass -File "C:\Users\Public\Downloads\Launch_Win11_Assistant.ps1"

Deployment with SOTI MobiControl

Step 1: Upload the Windows 11 Installation Assistant

• Push Windows11InstallationAssistant.exe to:

  C:\Users\Public\Downloads
  

Step 2: Upload the PowerShell Script

• Save your script as Launch_Win11_Assistant.ps1
• Deploy it to:

  C:\Users\Public\Downloads
  

Step 3: Trigger the Script via SOTI Script Send

Use this PowerShell command in the SOTI script console to execute the upgrade script immediately:

Start-Process powershell.exe -ArgumentList "-ExecutionPolicy Bypass -File `\"C:\Users\Public\Downloads\Launch_Win11_Assistant.ps1`\"" -WindowStyle Hidden -Verb RunAs

This ensures the script runs with elevated privileges, even in a user session.

Script Contents

# === Windows 11 Upgrade via Installation Assistant ===

$AssistantPath = "C:\Users\Public\Downloads\Windows11InstallationAssistant.exe"
$CustomLogFile = "C:\ProgramData\Windows11_Upgrade_CustomLog.txt"
$TranscriptFile = "C:\ProgramData\Windows11_Upgrade_Transcript.txt"

Start-Transcript -Path $TranscriptFile -Append

function LogMessage {
    param([string]$Message)
    $TimeStamp = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
    $LogEntry = "$TimeStamp - $Message"
    Write-Output $LogEntry
    Add-Content -Path $CustomLogFile -Value $LogEntry
}

LogMessage "=== Starting Windows 11 Upgrade Process ==="

if (Test-Path $AssistantPath) {
    LogMessage "Windows 11 Installation Assistant found at: $AssistantPath"
    
    try {
        LogMessage "Starting the Installation Assistant in quiet mode..."
        $process = Start-Process -FilePath $AssistantPath `
                                 -ArgumentList "/quietinstall", "/SkipEULA", "/SkipCompatCheck" `
                                 -NoNewWindow -PassThru -Wait
        if ($process.ExitCode -eq 0) {
            LogMessage "Windows 11 Installation process completed successfully."
        } else {
            LogMessage "Windows 11 Installation process completed with exit code: $($process.ExitCode)"
        }
    } catch {
        LogMessage "Error while running Windows 11 Installation Assistant: $_"
    }
} else {
    LogMessage "Error: Windows 11 Installation Assistant not found at: $AssistantPath"
}

LogMessage "=== Script execution finished ==="
Stop-Transcript

Example Manual Use (Without SOTI)

1. Place both:

   • Windows11InstallationAssistant.exe
   • Launch_Win11_Assistant.ps1 in C:\Users\Public\Downloads

2. Open PowerShell as Administrator

3. Run:

   powershell.exe -ExecutionPolicy Bypass -File "C:\Users\Public\Downloads\Launch_Win11_Assistant.ps1"

Logging

• Transcript: C:\ProgramData\Windows11_Upgrade_Transcript.txt
• Custom log: C:\ProgramData\Windows11_Upgrade_CustomLog.txt

Contributing

Contributions are welcome! Please open issues or PRs with improvements, fixes, or enhancements.