diff --git a/core/install.go b/core/install.go
index 3c0dfb3..21823d4 100644
--- a/core/install.go
+++ b/core/install.go
@@ -32,34 +32,19 @@ func install() {
 		gLog.Println(LvERROR, "cd error:", err)
 		return
 	}
-
 	uninstall()
 	// save config file
 	parseParams("install")
 	targetPath := filepath.Join(defaultInstallPath, defaultBinName)
 	d := daemon{}
-	// copy files
-
-	binPath, _ := os.Executable()
-	src, errFiles := os.Open(binPath) // can not use args[0], on Windows call openp2p is ok(=openp2p.exe)
-	if errFiles != nil {
-		gLog.Printf(LvERROR, "os.OpenFile %s error:%s", os.Args[0], errFiles)
-		return
-	}
-
-	dst, errFiles := os.OpenFile(targetPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0775)
-	if errFiles != nil {
-		gLog.Printf(LvERROR, "os.OpenFile %s error:%s", targetPath, errFiles)
-		return
-	}
-
-	_, errFiles = io.Copy(dst, src)
-	if errFiles != nil {
-		gLog.Printf(LvERROR, "io.Copy error:%s", errFiles)
-		return
+	binPath, _ := os.Executable() // can not use args[0], on Windows call openp2p is ok(=openp2p.exe)
+	if targetPath != binPath {
+		// copy files
+		errFiles := copyFile(targetPath, binPath)
+		if errFiles != nil {
+			gLog.Println(LvERROR, errFiles)
+		}
 	}
-	src.Close()
-	dst.Close()
 
 	// install system service
 	gLog.Println(LvINFO, "targetPath:", targetPath)
@@ -77,6 +62,23 @@ func install() {
 	gLog.Println(LvINFO, "Visit WebUI on https://console.openp2p.cn")
 }
 
+func copyFile(dst, src string) error {
+	srcF, err := os.Open(src)
+	if err != nil {
+		return fmt.Errorf("os.Open %s error: %w", src, err)
+	}
+	defer srcF.Close()
+	dstF, err := os.OpenFile(dst, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0775)
+	if err != nil {
+		return fmt.Errorf("os.OpenFile %s error: %w", dst, err)
+	}
+	defer dstF.Close()
+	_, err = io.Copy(dstF, srcF)
+	if err != nil {
+		return fmt.Errorf("io.Copy error: %w", err)
+	}
+}
+
 func installByFilename() {
 	params := strings.Split(filepath.Base(os.Args[0]), "-")
 	if len(params) < 4 {