diff --git a/changelog.md b/changelog.md
index 85c9d92..f7f2da5 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,11 @@
+# 1.9.1
+
+## 修复 (Fix)
+
+- 修复 Windows 下以管理员重启开启 TUN 时因单实例锁冲突导致的闪退问题
+- 修复托盘菜单开启 TUN 时管理员重启后继续执行导致的竞态问题
+- 修复关键资源文件复制失败时静默跳过导致内核启动异常的问题
+
 # 1.9.0
 
 ## 新功能 (Feat)
diff --git a/src/main/core/permissions.ts b/src/main/core/permissions.ts
index c45b687..d14676a 100644
--- a/src/main/core/permissions.ts
+++ b/src/main/core/permissions.ts
@@ -282,7 +282,11 @@ export async function restartAsAdmin(forTun: boolean = true): Promise<void> {
   managerLogger.info('Restarting as administrator with command', command)
 
   // 先启动 PowerShell（它会等待 1 秒），然后立即退出当前进程
-  exec(command, { windowsHide: true })
+  exec(command, { windowsHide: true }, (error) => {
+    if (error) {
+      managerLogger.error('Failed to start PowerShell for admin restart', error)
+    }
+  })
   managerLogger.info('PowerShell command started, quitting app immediately')
   app.exit(0)
 }
diff --git a/src/main/index.ts b/src/main/index.ts
index 3edafd4..6397736 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -87,13 +87,13 @@ async function checkHighPrivilegeCoreEarly(): Promise<void> {
     if (choice === 0) {
       try {
         await restartAsAdmin(false)
-        process.exit(0)
+        app.exit(0)
       } catch (error) {
         safeShowErrorBox('common.error.adminRequired', `${error}`)
-        process.exit(1)
+        app.exit(1)
       }
     } else {
-      process.exit(0)
+      app.exit(0)
     }
   } catch (e) {
     mainLogger.error('Failed to check high privilege core', e)
@@ -151,12 +151,14 @@ app.whenReady().then(async () => {
 
   try {
     initCoreWatcher()
-    const [startPromise] = await startCore()
-    startPromise.then(async () => {
-      await initProfileUpdater()
-      await initWebdavBackupScheduler()
-      await checkAdminRestartForTun()
-    })
+    const startPromises = await startCore()
+    if (startPromises.length > 0) {
+      startPromises[0].then(async () => {
+        await initProfileUpdater()
+        await initWebdavBackupScheduler()
+        await checkAdminRestartForTun()
+      })
+    }
   } catch (e) {
     safeShowErrorBox('mihomo.error.coreStartFailed', `${e}`)
   }
diff --git a/src/main/resolve/tray.ts b/src/main/resolve/tray.ts
index ed16714..bf719d0 100644
--- a/src/main/resolve/tray.ts
+++ b/src/main/resolve/tray.ts
@@ -253,6 +253,9 @@ export const buildContextMenu = async (): Promise<Menu> => {
               }
             } catch (error) {
               await trayLogger.warn('Permission check failed in tray', error)
+              item.checked = false
+              ipcMain.emit('updateTrayMenu')
+              return
             }
 
             await patchControledMihomoConfig({ tun: { enable }, dns: { enable: true } })
diff --git a/src/main/sys/sysproxy.ts b/src/main/sys/sysproxy.ts
index 5733f73..18bea16 100644
--- a/src/main/sys/sysproxy.ts
+++ b/src/main/sys/sysproxy.ts
@@ -97,10 +97,15 @@ async function enableSysProxy(): Promise<void> {
     }
   } else {
     // Windows / Linux 直接使用 sysproxy-rs
-    if (mode === 'auto') {
-      triggerAutoProxy(true, `http://${proxyHost}:${pacPort}/pac`)
-    } else {
-      triggerManualProxy(true, proxyHost, port, bypass.join(','))
+    try {
+      if (mode === 'auto') {
+        triggerAutoProxy(true, `http://${proxyHost}:${pacPort}/pac`)
+      } else {
+        triggerManualProxy(true, proxyHost, port, bypass.join(','))
+      }
+    } catch (error) {
+      await proxyLogger.error('Failed to enable system proxy', error)
+      throw error
     }
   }
 }
@@ -114,8 +119,13 @@ async function disableSysProxy(): Promise<void> {
     )
   } else {
     // Windows / Linux 直接使用 sysproxy-rs
-    triggerAutoProxy(false, '')
-    triggerManualProxy(false, '', 0, '')
+    try {
+      triggerAutoProxy(false, '')
+      triggerManualProxy(false, '', 0, '')
+    } catch (error) {
+      await proxyLogger.error('Failed to disable system proxy', error)
+      throw error
+    }
   }
 }
 
diff --git a/src/main/utils/init.ts b/src/main/utils/init.ts
index 0b9eb52..0fd1810 100644
--- a/src/main/utils/init.ts
+++ b/src/main/utils/init.ts
@@ -189,14 +189,11 @@ async function initFiles(): Promise<void> {
           await cp(sourcePath, targetPath, { recursive: true, force: true })
         } catch (error: unknown) {
           const code = (error as NodeJS.ErrnoException).code
-          if (code === 'EPERM' || code === 'EBUSY') {
-            // 文件被占用，如果目标已存在则跳过
-            if (existsSync(targetPath)) {
-              await initLogger.warn(`Skipping ${file}: file is in use`)
-              return
-            }
+          // 文件被占用或权限问题，如果目标已存在则跳过
+          if ((code === 'EPERM' || code === 'EBUSY' || code === 'EACCES') && existsSync(targetPath)) {
+            await initLogger.warn(`Skipping ${file}: file is in use or permission denied`)
+            return
           }
-          // 其他错误或目标不存在时，向上抛出让 criticalFiles 检查处理
           throw error
         }
       })