diff --git a/apps/frontend/src/main/index.ts b/apps/frontend/src/main/index.ts
index 7cd856a0..f236c4a7 100644
--- a/apps/frontend/src/main/index.ts
+++ b/apps/frontend/src/main/index.ts
@@ -1,4 +1,4 @@
-import { app, BrowserWindow, shell, nativeImage } from 'electron';
+import { app, BrowserWindow, shell, nativeImage, session } from 'electron';
 import { join } from 'path';
 import { accessSync, readFileSync, writeFileSync } from 'fs';
 import { electronApp, optimizer, is } from '@electron-toolkit/utils';
@@ -110,11 +110,25 @@ if (process.platform === 'darwin') {
   app.name = 'Auto Claude';
 }
 
+// Fix Windows GPU cache permission errors (0x5 Access Denied)
+if (process.platform === 'win32') {
+  app.commandLine.appendSwitch('disable-gpu-shader-disk-cache');
+  app.commandLine.appendSwitch('disable-gpu-program-cache');
+  console.log('[main] Applied Windows GPU cache fixes');
+}
+
 // Initialize the application
 app.whenReady().then(() => {
   // Set app user model id for Windows
   electronApp.setAppUserModelId('com.autoclaude.ui');
 
+  // Clear cache on Windows to prevent permission errors from stale cache
+  if (process.platform === 'win32') {
+    session.defaultSession.clearCache()
+      .then(() => console.log('[main] Cleared cache on startup'))
+      .catch((err) => console.warn('[main] Failed to clear cache:', err));
+  }
+
   // Set dock icon on macOS
   if (process.platform === 'darwin') {
     const iconPath = getIconPath();