diff --git a/auto-setup.ps1 b/auto-setup.ps1
index 0b3acab..20f35ff 100644
--- a/auto-setup.ps1
+++ b/auto-setup.ps1
@@ -237,6 +237,11 @@ function Run-CmdWithUI {
         [int]$timeoutMs = 180000,    # 默认 3 分钟
         [switch]$captureOutput        # 返回 stdout 内容
     )
+    # W-01: Windows Start-Process 兼容 — npm/npx 无扩展名是 Unix shell 脚本
+    if ($exe -in @("npm", "npx") -and -not $exe.EndsWith(".cmd")) {
+        $exe = "$exe.cmd"
+    }
+
     # B1: 脱敏日志 (去除 URL 内嵌凭证 user:pass@)
     $sanitizedArgs = ($arguments -join ' ') -replace '://[^@]+@', '://***@'
     Bw-Log "CMD" "$exe $sanitizedArgs"