diff --git a/DONE.md b/DONE.md
index 852f18a..3a980e2 100644
--- a/DONE.md
+++ b/DONE.md
@@ -20,6 +20,8 @@
   - Rewrote commit history to ensure consistent commit attribution.
 - ✅ **Installer dependency parity**
   - Ensured pip is installed (Linux/Windows) and skipped Go/pip installs when already present.
+- ✅ **Windows installer parse fix**
+  - Normalized PowerShell here-strings to prevent parse errors during installation.
 
 ## Version 0.1.0-dev25 (2026-01-22) - Settings Preferences Expansion
 
diff --git a/TODO.md b/TODO.md
index 593d75a..0351842 100644
--- a/TODO.md
+++ b/TODO.md
@@ -6,6 +6,8 @@ This file tracks upcoming features, improvements, and known issues.
 
 - [X] **Installer dependency parity**
   - Ensure pip is installed on Linux/Windows and skip Go/pip when already present.
+- [X] **Windows installer parse fix**
+  - Normalize PowerShell here-strings to prevent parser errors.
 
 ## Documentation: Fix Structural Errors
 
diff --git a/docs/INSTALL_WINDOWS.md b/docs/INSTALL_WINDOWS.md
index 2d17a0a..a3dbac8 100644
--- a/docs/INSTALL_WINDOWS.md
+++ b/docs/INSTALL_WINDOWS.md
@@ -92,5 +92,6 @@ This makes FFmpeg available to all applications on your system.
 ## Troubleshooting
 
 -   **"FFmpeg not found" Error:** This means VideoTools can't locate `ffmpeg.exe`. Ensure it's either in the same folder as `VideoTools.exe` or that the system-wide installation path is correct.
+-   **Installer Parse Errors:** If the setup script reports PowerShell parse errors, update the repository to the latest version and re-run `setup-windows.bat`.
 -   **Application Doesn't Start:** Make sure you have a 64-bit version of Windows 10 or 11 and that your graphics drivers are up to date.
 -   **Antivirus Warnings:** Some antivirus programs may flag the unsigned executable. This is a false positive.
diff --git a/scripts/install-deps-windows.ps1 b/scripts/install-deps-windows.ps1
index 1d69fc8..deebb8a 100644
--- a/scripts/install-deps-windows.ps1
+++ b/scripts/install-deps-windows.ps1
@@ -87,21 +87,21 @@ function Get-WindowsDisplayScale {
         }
         
         # Fallback: try to detect from system settings
-        Add-Type -TypeDefinition @"
+        Add-Type -TypeDefinition @'
 using System;
 using System.Runtime.InteropServices;
 public class DisplayScale {
     [DllImport("user32.dll")]
     public static extern IntPtr GetDC(IntPtr ptr);
-    
+
     [DllImport("gdi32.dll")]
     public static extern int GetDeviceCaps(IntPtr hdc, int nIndex);
-    
+
     [DllImport("user32.dll")]
     public static extern int ReleaseDC(IntPtr ptr, IntPtr hdc);
-    
+
     public const int LOGPIXELSX = 88;
-    
+
     public static double GetScale() {
         IntPtr hdc = GetDC(IntPtr.Zero);
         int dpi = GetDeviceCaps(hdc, LOGPIXELSX);
@@ -109,7 +109,7 @@ public class DisplayScale {
         return dpi / 96.0;
     }
 }
-"@
+'@
         
         return [DisplayScale]::GetScale()
     } catch {
@@ -140,16 +140,16 @@ function Get-WindowsGPUInfo {
 function Test-DirectX12Support {
     try {
         # Check for DirectX 12 support by trying to load d3d12.dll
-        Add-Type -TypeDefinition @"
+        Add-Type -TypeDefinition @'
 using System;
 using System.Runtime.InteropServices;
 public class DirectXChecker {
     [DllImport("kernel32.dll")]
     public static extern IntPtr LoadLibrary(string lpFileName);
-    
+
     [DllImport("kernel32.dll")]
     public static extern bool FreeLibrary(IntPtr hModule);
-    
+
     public static bool IsDirectX12Supported() {
         IntPtr handle = LoadLibrary("d3d12.dll");
         bool supported = handle != IntPtr.Zero;
@@ -157,7 +157,7 @@ public class DirectXChecker {
         return supported;
     }
 }
-"@
+'@
         return [DirectXChecker]::IsDirectX12Supported()
     } catch {
         return $false