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# ==============================================================================
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# Script Name: Update-8x8Work-DualSession.ps1
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# Description: Downloads 8x8, launches a zero-console interactive JCT600 GUI
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# in the active user's session via VBScript wrapper (BOM fixed),
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# waits for completion/override (1-hour countdown), silently installs,
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# relaunches 8x8 Work, and guarantees scheduled task cleanup.
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# ==============================================================================
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# Ensure script is running elevated
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if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
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Write-Error "This script must be executed with Administrator privileges."
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exit 1
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}
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# Use C:\ProgramData\ so standard users have full read/execute access
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$workDir = "C:\ProgramData\JCT600_8x8Update"
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$flagFile = Join-Path $workDir "8x8_Update_Proceed.flag"
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$guiScript = Join-Path $workDir "Show-8x8UserGui.ps1"
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$vbsScript = Join-Path $workDir "LaunchGuiHidden.vbs"
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$taskName = "JCT600_8x8_Update_Notification"
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if (-not (Test-Path $workDir)) {
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New-Item -Path $workDir -ItemType Directory -Force | Out-Null
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}
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# Clean stale flag file
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if (Test-Path $flagFile) { Remove-Item $flagFile -Force }
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try {
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# --------------------------------------------------------------------------
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# Step 1: Download 8x8 Setup Installer
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# --------------------------------------------------------------------------
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$installerUrl = "https://work-desktop-assets.8x8.com/prod-publish/ga/work-64-msi-v8.35.2-6.msi"
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$installerPath = Join-Path $workDir "8x8_Work_Installer.msi"
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Write-Host "[1/5] Downloading 8x8 Work installer..." -ForegroundColor Cyan
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try {
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Invoke-WebRequest -Uri $installerUrl -OutFile $installerPath -UseBasicParsing
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Write-Host "Download complete: $installerPath" -ForegroundColor Green
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} catch {
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Write-Error "Failed to download installer from $installerUrl. Error: $_"
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exit 1
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}
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# --------------------------------------------------------------------------
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# Step 2: Write User GUI & Zero-Console VBS Launcher (BOM-Free ASCII)
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# --------------------------------------------------------------------------
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Write-Host "[2/5] Generating user-session GUI and hidden launcher..." -ForegroundColor Cyan
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$guiContent = @'
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Add-Type -AssemblyName System.Windows.Forms
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Add-Type -AssemblyName System.Drawing
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$signature = @"
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[DllImport("user32.dll", SetLastError = true)]
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public static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
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"@
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$Win32SetWindowPos = Add-Type -memberDefinition $signature -Name "Win32SetWindowPos" -namespace Win32Functions -passThru
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$flagPath = "C:\ProgramData\JCT600_8x8Update\8x8_Update_Proceed.flag"
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$form = New-Object System.Windows.Forms.Form
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$form.Text = "JCT600 IT Support — 8x8 Work Update"
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$form.Size = New-Object System.Drawing.Size(440, 250)
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$form.StartPosition = 'CenterScreen'
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$form.FormBorderStyle = 'FixedDialog'
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$form.MaximizeBox = $false
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$form.MinimizeBox = $false
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$form.ControlBox = $false
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$form.TopMost = $true
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$script:allowClose = $false
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$form.Add_FormClosing({
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param($sender, $e)
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if (-not $script:allowClose) { $e.Cancel = $true }
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})
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$labelHeader = New-Object System.Windows.Forms.Label
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$labelHeader.Text = "JCT600 — IT SUPPORT"
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$labelHeader.Location = New-Object System.Drawing.Point(20, 15)
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$labelHeader.Size = New-Object System.Drawing.Size(380, 25)
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$labelHeader.Font = New-Object System.Drawing.Font("Segoe UI", 11, [System.Drawing.FontStyle]::Bold)
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$labelHeader.ForeColor = [System.Drawing.Color]::Navy
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$labelHeader.TextAlign = 'TopCenter'
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$form.Controls.Add($labelHeader)
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$labelMsg = New-Object System.Windows.Forms.Label
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$labelMsg.Text = "An automatic update for 8x8 Work has been scheduled by IT Support.`nPlease save active work or click 'Update Now' to begin."
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$labelMsg.Location = New-Object System.Drawing.Point(20, 45)
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$labelMsg.Size = New-Object System.Drawing.Size(380, 45)
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$labelMsg.Font = New-Object System.Drawing.Font("Segoe UI", 9)
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$labelMsg.TextAlign = 'TopCenter'
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$form.Controls.Add($labelMsg)
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$labelTimer = New-Object System.Windows.Forms.Label
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$labelTimer.Location = New-Object System.Drawing.Point(20, 95)
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$labelTimer.Size = New-Object System.Drawing.Size(380, 40)
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$labelTimer.Font = New-Object System.Drawing.Font("Segoe UI", 20, [System.Drawing.FontStyle]::Bold)
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$labelTimer.ForeColor = [System.Drawing.Color]::DarkRed
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$labelTimer.TextAlign = 'MiddleCenter'
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$form.Controls.Add($labelTimer)
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$btnUpdateNow = New-Object System.Windows.Forms.Button
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$btnUpdateNow.Text = "Update Now"
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$btnUpdateNow.Font = New-Object System.Drawing.Font("Segoe UI", 9, [System.Drawing.FontStyle]::Bold)
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$btnUpdateNow.Size = New-Object System.Drawing.Size(140, 35)
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$btnUpdateNow.Location = New-Object System.Drawing.Point(140, 150)
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$btnUpdateNow.UseVisualStyleBackColor = $true
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$btnUpdateNow.Add_Click({
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$timer.Stop()
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$script:allowClose = $true
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New-Item -Path $flagPath -ItemType File -Force | Out-Null
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$form.Close()
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})
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$form.Controls.Add($btnUpdateNow)
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$form.Add_Shown({
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[Win32Functions.Win32SetWindowPos]::SetWindowPos($form.Handle, [IntPtr] -1, 0, 0, 0, 0, 0x0003) | Out-Null
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$form.Activate()
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})
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$timer = New-Object System.Windows.Forms.Timer
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$timer.Interval = 1000
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$script:remaining = 3600 # 1 Hour
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$timer.Add_Tick({
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if ($script:remaining -gt 0) {
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$timeSpan = [TimeSpan]::FromSeconds($script:remaining)
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$labelTimer.Text = $timeSpan.ToString("hh\:mm\:ss")
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$script:remaining--
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[Win32Functions.Win32SetWindowPos]::SetWindowPos($form.Handle, [IntPtr] -1, 0, 0, 0, 0, 0x0003) | Out-Null
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} else {
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$timer.Stop()
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$script:allowClose = $true
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New-Item -Path $flagPath -ItemType File -Force | Out-Null
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$form.Close()
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}
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})
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$initialSpan = [TimeSpan]::FromSeconds($script:remaining)
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$labelTimer.Text = $initialSpan.ToString("hh\:mm\:ss")
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$timer.Start()
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$form.ShowDialog() | Out-Null
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$timer.Dispose()
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$form.Dispose()
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'@
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# Write GUI script cleanly
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[System.IO.File]::WriteAllText($guiScript, $guiContent, [System.Text.Encoding]::UTF8)
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# VBScript Wrapper to suppress the console (Written as ASCII to prevent BOM errors)
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$vbsContent = @"
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Set WshShell = CreateObject("WScript.Shell")
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WshShell.Run "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -File ""$guiScript""", 0, False
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"@
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[System.IO.File]::WriteAllText($vbsScript, $vbsContent, [System.Text.Encoding]::ASCII)
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# --------------------------------------------------------------------------
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# Step 3: Trigger Interactive GUI via VBS Wrapper in User's Session
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# --------------------------------------------------------------------------
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Write-Host "[3/5] Launching dialog in active user's desktop session..." -ForegroundColor Cyan
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$loggedUser = (Get-CimInstance -ClassName Win32_ComputerSystem).UserName
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if ([string]::IsNullOrEmpty($loggedUser)) {
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$explorerProc = Get-Process -Name explorer -ErrorAction SilentlyContinue | Select-Object -First 1
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if ($explorerProc) {
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$loggedUser = (Get-CimInstance -ClassName Win32_Process -Filter "ProcessId = $($explorerProc.Id)" | Invoke-CimMethod -MethodName GetOwner).User
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}
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}
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if ([string]::IsNullOrEmpty($loggedUser)) {
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Write-Warning "No active interactive user detected. Proceeding directly to silent update."
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} else {
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Write-Host "Detected active user: $loggedUser" -ForegroundColor Green
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$action = New-ScheduledTaskAction -Execute "wscript.exe" -Argument "`"$vbsScript`""
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$principal = New-ScheduledTaskPrincipal -UserId $loggedUser -LogonType Interactive -RunLevel Limited
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Register-ScheduledTask -TaskName $taskName -Action $action -Principal $principal -Force | Out-Null
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Start-ScheduledTask -TaskName $taskName
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Write-Host "Waiting for user dialog response or timer expiration (1 hour max)..." -ForegroundColor Yellow
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while (-not (Test-Path $flagFile)) {
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Start-Sleep -Seconds 2
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}
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}
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# --------------------------------------------------------------------------
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# Step 4: Close Running 8x8 Processes & Install Silently
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# --------------------------------------------------------------------------
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Write-Host "[4/5] Stopping 8x8 processes and installing silently..." -ForegroundColor Cyan
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$targetProcesses = Get-Process | Where-Object {
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$_.ProcessName -like "*8x8*" -or $_.MainWindowTitle -like "*8x8*"
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}
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if ($targetProcesses) {
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foreach ($proc in $targetProcesses) {
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Stop-Process -Id $proc.Id -Force -ErrorAction SilentlyContinue
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}
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Start-Sleep -Seconds 3
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}
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$msiArgs = "/i `"$installerPath`" /quiet /norestart"
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$installJob = Start-Process msiexec.exe -ArgumentList $msiArgs -Wait -PassThru
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if ($installJob.ExitCode -ne 0 -and $installJob.ExitCode -ne 3010) {
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Write-Error "Installation failed with exit code $($installJob.ExitCode)."
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exit $installJob.ExitCode
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}
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Write-Host "Installation completed successfully." -ForegroundColor Green
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# --------------------------------------------------------------------------
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# Step 5: Launch 8x8 Work
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# --------------------------------------------------------------------------
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Write-Host "[5/5] Launching 8x8 Work..." -ForegroundColor Cyan
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$possiblePaths = @(
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"${env:ProgramFiles}\8x8 Inc\8x8 Work\8x8 Work.exe",
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"${env:ProgramFiles(x86)}\8x8 Inc\8x8 Work\8x8 Work.exe",
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"${env:ProgramFiles}\8x8 Work\8x8 Work.exe",
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"$env:LocalAppData\Programs\8x8 Work\8x8 Work.exe"
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)
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$exePath = $possiblePaths | Where-Object { Test-Path $_ } | Select-Object -First 1
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if ($exePath) {
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Start-Process -FilePath $exePath
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Write-Host "8x8 Work launched successfully from: $exePath" -ForegroundColor Green
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} else {
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Write-Warning "Could not locate 8x8 Work executable at 'C:\Program Files\8x8 Inc\8x8 Work\8x8 Work.exe' or fallback directories."
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}
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} finally {
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# --------------------------------------------------------------------------
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# Mandatory Cleanup: Deletes Scheduled Task & Temp Files
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# --------------------------------------------------------------------------
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Write-Host "Cleaning up scheduled task and temporary files..." -ForegroundColor Gray
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Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue
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if (Test-Path $workDir) {
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Remove-Item $workDir -Recurse -Force -ErrorAction SilentlyContinue
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}
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}
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