Something I was playing with to ensure my system updates every day, so I run this at the end of the day…

'Restart-PC.ps1'
# Define log file for capturing the output
$logFile = "c:\windows\temp\windows11update-log.txt"

function Write-Log {
    param (
        [string]$message
    )
    $timestamp = (Get-Date).ToString("yyyy-MM-dd HH:mm:ss")
    "$timestamp - $message" | Out-File -Append -FilePath $logFile
}

function Update-PC {
    Write-Host "Checking for updates..."
    Write-Log "Started checking for updates..."
    
    try {
        $session = New-Object -ComObject Microsoft.Update.Session
        $searcher = $session.CreateUpdateSearcher()
        $search = $searcher.Search("IsInstalled=0")

        if ($search.Updates.Count -eq 0) {
            Write-Host "No updates available."
            Write-Log "No updates available."
            return
        }

        Write-Host "$($search.Updates.Count) updates found. Downloading and installing updates..."
        Write-Log "$($search.Updates.Count) updates found."

        $downloads = New-Object -ComObject Microsoft.Update.UpdateColl
        foreach ($update in $search.Updates) {
            $downloads.Add($update)
            Write-Host "Preparing to download: $($update.Title)"
            Write-Log "Preparing to download: $($update.Title)"
        }
        
        # Download updates
        $downloader = $session.CreateUpdateDownloader()
        $downloader.Updates = $downloads
        Write-Host "Downloading updates..."
        Write-Log "Downloading updates..."
        $downloader.Download()

        if ($downloader.Status -ne 0) {
            Write-Error "Failed to download updates."
            Write-Log "Failed to download updates."
            return
        }

        # Install updates
        $installer = $session.CreateUpdateInstaller()
        $installer.Updates = $downloads
        Write-Host "Installing updates..."
        Write-Log "Installing updates..."
        $installationResult = $installer.Install()

        if ($installationResult.ResultCode -eq 2) {  # 2 indicates success
            Write-Host "Update installation completed."
            Write-Log "Update installation completed."
        } else {
            Write-Error "Failed to install updates. Result Code: $($installationResult.ResultCode)"
            Write-Log "Failed to install updates. Result Code: $($installationResult.ResultCode)"
        }
        
    } catch {
        Write-Error "An error occurred: $_"
        Write-Log "An error occurred: $_"
    }
}

# Execute the update function
Update-PC

# Prompt for restart
if ($installationResult.ResultCode -eq 2) {  # Only restart if updates were installed successfully
    Read-Host "Press Enter to restart the computer for the updates..."
    Restart-Computer
} else {
    Write-Host "No restart required for patching."
    Restart-Computer -confirm
}