diff --git a/main.py b/main.py
index 8f28c13..6b4f6c9 100644
--- a/main.py
+++ b/main.py
@@ -79,24 +79,25 @@ class Api:
         if callable(command):
             command = command()
         custom_event(command + "\n")
-        with Popen(
-            command,
-            stdout=PIPE,
-            stderr=STDOUT,
-            shell=True,
-            bufsize=1,
-            text=True,
-            cwd=cwd,
-            encoding="utf-8",
-        ) as p:
-            for line in p.stdout:
-                custom_event(line)
+        try:
+            with Popen(
+                command, stdout=PIPE, stderr=STDOUT, shell=True, cwd=cwd, bufsize=0
+            ) as p:
+                for data in p.stdout:
+                    try:
+                        text = data.decode("utf-8")
+                    except Exception:
+                        text = data.decode("gbk")
+                    custom_event(text)
+            if p.returncode == 0:
+                return "success"
+        except Exception as e:
+            custom_event(str(e))
+        return "failed"
 
 
 window = webview.create_window(
-    f"mower-ng launcher {version}",
-    "ui/dist/index.html",
-    js_api=Api(),
+    f"mower-ng launcher {version}", "ui/dist/index.html", js_api=Api()
 )
 webview.start()
 
diff --git a/ui/src/components/FloatButton.vue b/ui/src/components/FloatButton.vue
index 4509c77..06f16c1 100644
--- a/ui/src/components/FloatButton.vue
+++ b/ui/src/components/FloatButton.vue
@@ -17,7 +17,16 @@ async function start() {
     current_step.value = i + 1
     current_state.value = 'process'
     for (const cmd of step.command) {
-      await pywebview.api.run(cmd, step.cwd)
+      if ((await pywebview.api.run(cmd, step.cwd)) == 'failed') {
+        current_state.value = 'error'
+        running.value = false
+        notification['error']({
+          content: '错误',
+          meta: '命令运行失败',
+          duration: 3000
+        })
+        return
+      }
     }
   }
   current_state.value = 'finish'
diff --git a/ui/src/pages/Fix.vue b/ui/src/pages/Fix.vue
index 019c9d5..1f97086 100644
--- a/ui/src/pages/Fix.vue
+++ b/ui/src/pages/Fix.vue
@@ -1,6 +1,8 @@
 <script setup>
+const running = inject('running')
 const notification = useNotification()
 async function rm_site_packages() {
+  running.value = true
   notification['info']({
     content: '提示',
     meta: '开始移除site-packages',
@@ -12,6 +14,7 @@ async function rm_site_packages() {
     meta: response,
     duration: 3000
   })
+  running.value = false
 }
 </script>