diff --git a/Wox/util/single_instance/single_instance_posix.go b/Wox/util/single_instance/single_instance_posix.go
index 26976f9f0..089f8b11b 100644
--- a/Wox/util/single_instance/single_instance_posix.go
+++ b/Wox/util/single_instance/single_instance_posix.go
@@ -8,28 +8,23 @@ import (
 	"wox/util"
 )
 
-// CreateLockFile tries to create a file with given name and acquire an
-// exclusive lock on it. If the file already exists AND is still locked, it will
-// fail.
 func lock(content string) error {
 	filename := util.GetLocation().GetAppLockFilePath()
 	file, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE, 0600)
 	if err != nil {
 		return err
 	}
+	defer file.Close()
 
 	err = syscall.Flock(int(file.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
 	if err != nil {
-		file.Close()
 		return err
 	}
 
 	if err := file.Truncate(0); err != nil {
-		file.Close()
 		return err
 	}
 	if _, err := file.WriteString(content); err != nil {
-		file.Close()
 		return err
 	}
 
diff --git a/Wox/util/single_instance/single_instance_windows.go b/Wox/util/single_instance/single_instance_windows.go
index 486ef93ad..1c3eb446f 100644
--- a/Wox/util/single_instance/single_instance_windows.go
+++ b/Wox/util/single_instance/single_instance_windows.go
@@ -4,27 +4,25 @@ package single_instance
 
 import (
 	"os"
+	"syscall"
 	"wox/util"
 )
 
 func lock(content string) error {
 	filename := util.GetLocation().GetAppLockFilePath()
-	if _, err := os.Stat(filename); err == nil {
-		// If the files exists, we first try to remove it
-		if err = os.Remove(filename); err != nil {
-			return err
-		}
-	} else if !os.IsNotExist(err) {
+	file, err := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, 0600)
+	if err != nil {
 		return err
 	}
+	defer file.Close()
 
-	file, err := os.OpenFile(filename, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0600)
+	var overlapped syscall.Overlapped
+	err = syscall.LockFileEx(syscall.Handle(file.Fd()), syscall.LOCKFILE_EXCLUSIVE_LOCK, 0, 1, 0, &overlapped)
 	if err != nil {
 		return err
 	}
 
-	_, err = file.WriteString(content)
-	if err != nil {
+	if _, err := file.WriteString(content); err != nil {
 		return err
 	}