Update 8x8_Work_Updater.ps1

8x8_Work_Updater.ps1

@@ -1,8 +1,8 @@
 # ==============================================================================
 # Script Name: 8x8_Work_Updater.ps1
-# Description: Downloads 8x8 with a progress bar, triggers a blocking 1-hour 
+# Description: Downloads 8x8, launches an interactive JCT600 GUI inside the 
-#              popup alert, silently installs, and launches 8x8 under the standard 
+#              active user's desktop session using Explorer process injection, 
-#              user session via Explorer.
+#              waits for response/timer, silently installs, and relaunches 8x8.
 # ==============================================================================
 
 # Ensure script is running elevated
@@ -11,23 +11,32 @@ if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdenti
     exit 1
 }
 
-# Load required .NET assemblies
 Add-Type -AssemblyName System.Net.Http
 
 $workDir   = "C:\ProgramData\JCT600_8x8Update"
-$installerPath = Join-Path $workDir "8x8_Work_Installer.msi"
+$flagFile  = Join-Path $workDir "8x8_Update_Proceed.flag"
-$vbsAlertPath  = Join-Path $workDir "ShowUserAlert.vbs"
+$guiScript = Join-Path $workDir "Show-8x8UserGui.ps1"
 
 if (-not (Test-Path $workDir)) {
     New-Item -Path $workDir -ItemType Directory -Force | Out-Null
 }
 
+# Ensure standard users have full read/execute permissions to the folder
+$acl = Get-Acl $workDir
+$rule = New-Object System.Security.AccessControl.FileSystemAccessRule("BUILTIN\Users", "FullControl", "ContainerInherit,ObjectInherit", "None", "Allow")
+$acl.AddAccessRule($rule)
+Set-Acl $workDir $acl
+
+if (Test-Path $flagFile) { Remove-Item $flagFile -Force }
+
 try {
     # --------------------------------------------------------------------------
     # Step 1: Download 8x8 Setup Installer with Console Progress Bar
     # --------------------------------------------------------------------------
     $installerUrl  = "https://work-desktop-assets.8x8.com/prod-publish/ga/work-64-msi-v8.35.2-6.msi"
-    Write-Host "[1/4] Downloading 8x8 Work installer..." -ForegroundColor Cyan
+    $installerPath = Join-Path $workDir "8x8_Work_Installer.msi"
+
+    Write-Host "[1/5] Downloading 8x8 Work installer..." -ForegroundColor Cyan
 
     try {
         $httpClient = New-Object System.Net.Http.HttpClient
@@ -64,26 +73,148 @@ try {
     }
 
     # --------------------------------------------------------------------------
-    # Step 2: Trigger Blocking Interactive Popup (Waits for Click or 1 Hour)
+    # Step 2: Write User-Session GUI Script (BOM-Free UTF-8)
     # --------------------------------------------------------------------------
-    Write-Host "[2/4] Triggering interactive alert on active user's desktop..." -ForegroundColor Cyan
+    Write-Host "[2/5] Generating user-session GUI dialog script..." -ForegroundColor Cyan
 
-    # Generate a blocking VBScript WshShell.Popup (Type 48 = Exclamation, 4096 = System Modal / Always on top)
+    $guiContent = @'
-    $vbsContent = @"
+Add-Type -AssemblyName System.Windows.Forms
-Set wshShell = CreateObject("WScript.Shell")
+Add-Type -AssemblyName System.Drawing
-intButton = wshShell.Popup("An automatic update for 8x8 Work has been scheduled by JCT600 IT Support." & vbCrLf & vbCrLf & "Please save active work and finish ongoing calls." & vbCrLf & vbCrLf & "Click OK or close this window to update immediately, or wait for the 1-hour timer.", 3600, "JCT600 IT Support — 8x8 Work Update", 48 + 4096)
+
+$signature = @"
+[DllImport("user32.dll", SetLastError = true)]
+public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
 "@
+$Win32SetWindowPos = Add-Type -memberDefinition $signature -Name "Win32SetWindowPos" -namespace Win32Functions -passThru
 
-    [System.IO.File]::WriteAllText($vbsAlertPath, $vbsContent, [System.Text.Encoding]::ASCII)
+$flagPath = "C:\ProgramData\JCT600_8x8Update\8x8_Update_Proceed.flag"
 
-    # Launch popup and WAIT for user click or 3600-second timeout
+$form = New-Object System.Windows.Forms.Form
-    Write-Host "Waiting for user acknowledgment or 1-hour timeout..." -ForegroundColor Yellow
+$form.Text = "JCT600 IT Support — 8x8 Work Update"
-    $popupProcess = Start-Process "wscript.exe" -ArgumentList "`"$vbsAlertPath`"" -Wait -PassThru
+$form.Size = New-Object System.Drawing.Size(440, 250)
+$form.StartPosition = 'CenterScreen'
+$form.FormBorderStyle = 'FixedDialog'
+$form.MaximizeBox = $false
+$form.MinimizeBox = $false
+$form.ControlBox = $false
+$form.TopMost = $true
+
+$script:allowClose = $false
+$form.Add_FormClosing({
+    param($sender, $e)
+    if (-not $script:allowClose) { $e.Cancel = $true }
+})
+
+$labelHeader = New-Object System.Windows.Forms.Label
+$labelHeader.Text = "JCT600 — IT SUPPORT"
+$labelHeader.Location = New-Object System.Drawing.Point(20, 15)
+$labelHeader.Size = New-Object System.Drawing.Size(380, 25)
+$labelHeader.Font = New-Object System.Drawing.Font("Segoe UI", 11, [System.Drawing.FontStyle]::Bold)
+$labelHeader.ForeColor = [System.Drawing.Color]::Navy
+$labelHeader.TextAlign = 'TopCenter'
+$form.Controls.Add($labelHeader)
+
+$labelMsg = New-Object System.Windows.Forms.Label
+$labelMsg.Text = "An automatic update for 8x8 Work has been scheduled by IT Support.`nPlease save active work or click 'Update Now' to begin."
+$labelMsg.Location = New-Object System.Drawing.Point(20, 45)
+$labelMsg.Size = New-Object System.Drawing.Size(380, 45)
+$labelMsg.Font = New-Object System.Drawing.Font("Segoe UI", 9)
+$labelMsg.TextAlign = 'TopCenter'
+$form.Controls.Add($labelMsg)
+
+$labelTimer = New-Object System.Windows.Forms.Label
+$labelTimer.Location = New-Object System.Drawing.Point(20, 95)
+$labelTimer.Size = New-Object System.Drawing.Size(380, 40)
+$labelTimer.Font = New-Object System.Drawing.Font("Segoe UI", 20, [System.Drawing.FontStyle]::Bold)
+$labelTimer.ForeColor = [System.Drawing.Color]::DarkRed
+$labelTimer.TextAlign = 'MiddleCenter'
+$form.Controls.Add($labelTimer)
+
+$btnUpdateNow = New-Object System.Windows.Forms.Button
+$btnUpdateNow.Text = "Update Now"
+$btnUpdateNow.Font = New-Object System.Drawing.Font("Segoe UI", 9, [System.Drawing.FontStyle]::Bold)
+$btnUpdateNow.Size = New-Object System.Drawing.Size(140, 35)
+$btnUpdateNow.Location = New-Object System.Drawing.Point(140, 150)
+$btnUpdateNow.UseVisualStyleBackColor = $true
+
+$btnUpdateNow.Add_Click({
+    $timer.Stop()
+    $script:allowClose = $true
+    New-Item -Path $flagPath -ItemType File -Force | Out-Null
+    $form.Close()
+})
+$form.Controls.Add($btnUpdateNow)
+
+$form.Add_Shown({
+    [Win32Functions.Win32SetWindowPos]::SetWindowPos($form.Handle, [IntPtr] -1, 0, 0, 0, 0, 0x0003) | Out-Null
+    $form.Activate()
+})
+
+$timer = New-Object System.Windows.Forms.Timer
+$timer.Interval = 1000
+$script:remaining = 3600 # 1 Hour
+
+$timer.Add_Tick({
+    if ($script:remaining -gt 0) {
+        $timeSpan = [TimeSpan]::FromSeconds($script:remaining)
+        $labelTimer.Text = $timeSpan.ToString("hh\:mm\:ss")
+        $script:remaining--
+        [Win32Functions.Win32SetWindowPos]::SetWindowPos($form.Handle, [IntPtr] -1, 0, 0, 0, 0, 0x0003) | Out-Null
+    } else {
+        $timer.Stop()
+        $script:allowClose = $true
+        New-Item -Path $flagPath -ItemType File -Force | Out-Null
+        $form.Close()
+    }
+})
+
+$initialSpan = [TimeSpan]::FromSeconds($script:remaining)
+$labelTimer.Text = $initialSpan.ToString("hh\:mm\:ss")
+
+$timer.Start()
+$form.ShowDialog() | Out-Null
+$timer.Dispose()
+$form.Dispose()
+'@
+
+    $utf8NoBom = New-Object System.Text.UTF8Encoding($false)
+    [System.IO.File]::WriteAllText($guiScript, $guiContent, $utf8NoBom)
 
     # --------------------------------------------------------------------------
-    # Step 3: Close Running 8x8 Processes & Install Silently
+    # Step 3: Trigger Interactive GUI in Active Desktop Session
     # --------------------------------------------------------------------------
-    Write-Host "[3/4] Stopping 8x8 processes and installing silently..." -ForegroundColor Cyan
+    Write-Host "[3/5] Launching interactive dialog on user desktop..." -ForegroundColor Cyan
+
+    $explorerProc = Get-Process -Name explorer -ErrorAction SilentlyContinue | Select-Object -First 1
+
+    if (-not $explorerProc) {
+        Write-Warning "No active desktop session detected. Proceeding directly to update."
+    } else {
+        # Inject GUI execution trigger into the active user's explorer shell context
+        $taskName = "JCT600_8x8_GUI_Task"
+        $action = New-ScheduledTaskAction -Execute "powershell.exe" -Argument "-ExecutionPolicy Bypass -WindowStyle Hidden -File `"$guiScript`""
+        
+        # Using Interactive logon trigger bypasses Session 0 isolation
+        $trigger = New-ScheduledTaskTrigger -At (Get-Date).AddSeconds(1) -Once
+        $settings = New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -Priority 0
+
+        # Register task under INTERACTIVE user token
+        $task = New-ScheduledTask -Action $action -Trigger $trigger -Settings $settings
+        Register-ScheduledTask -TaskName $taskName -InputObject $task -User "INTERACTIVE" -Force | Out-Null
+        Start-ScheduledTask -TaskName $taskName | Out-Null
+
+        Write-Host "Waiting for user dialog response or timer expiration (1 hour max)..." -ForegroundColor Yellow
+        while (-not (Test-Path $flagFile)) {
+            Start-Sleep -Seconds 2
+        }
+
+        Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
+    }
+
+    # --------------------------------------------------------------------------
+    # Step 4: Close Running 8x8 Processes & Install Silently
+    # --------------------------------------------------------------------------
+    Write-Host "[4/5] Stopping 8x8 processes and installing silently..." -ForegroundColor Cyan
 
     $targetProcesses = Get-Process | Where-Object { 
         $_.ProcessName -like "*8x8*" -or $_.MainWindowTitle -like "*8x8*" 
@@ -107,9 +238,9 @@ intButton = wshShell.Popup("An automatic update for 8x8 Work has been scheduled
     Write-Host "Installation completed successfully." -ForegroundColor Green
 
     # --------------------------------------------------------------------------
-    # Step 4: Launch 8x8 Work via Explorer (User Context)
+    # Step 5: Launch 8x8 Work via Explorer Shell
     # --------------------------------------------------------------------------
-    Write-Host "[4/4] Launching 8x8 Work in user session..." -ForegroundColor Cyan
+    Write-Host "[5/5] Launching 8x8 Work..." -ForegroundColor Cyan
 
     $possiblePaths = @(
         "${env:ProgramFiles}\8x8 Inc\8x8 Work\8x8 Work.exe",
@@ -121,15 +252,20 @@ intButton = wshShell.Popup("An automatic update for 8x8 Work has been scheduled
     $exePath = $possiblePaths | Where-Object { Test-Path $_ } | Select-Object -First 1
 
     if ($exePath) {
-        # Using explorer.exe to launch the executable forces Windows to run 8x8 in 
+        if ($explorerProc) {
-        # the interactive standard user's desktop context, preventing GPU crashes.
+            # Run 8x8 via explorer.exe to launch under standard user graphics context
             Start-Process "explorer.exe" -ArgumentList "`"$exePath`""
             Write-Host "8x8 Work launched successfully." -ForegroundColor Green
+        } else {
+            Start-Process -FilePath $exePath
+        }
     } else {
         Write-Warning "Could not locate 8x8 Work executable."
     }
 
 } finally {
     Write-Host "Cleaning up temporary files..." -ForegroundColor Gray
-    if (Test-Path $workDir) { Remove-Item $workDir -Recurse -Force -ErrorAction SilentlyContinue }
+    if (Test-Path $workDir) {
+        Remove-Item $workDir -Recurse -Force -ErrorAction SilentlyContinue
+    }
 }