ASUS officially supports for the X441U series. If your specific driver version is not listed on the ASUS site (e.g., for very old X441U models), you can try Windows 8.1 drivers in compatibility mode, but this is not guaranteed to work perfectly.
The safest and most reliable source for your drivers is always the manufacturer's website. Depending on your specific sub-model, use these links: X441UA - Support - ASUS asus x441u driver windows 10
For Windows 10, it is often better to let Windows Update fetch the latest Wi-Fi driver, or download directly from Realtek’s website. The ASUS-provided Windows 8.1 Wi-Fi driver may cause disconnections. ASUS officially supports for the X441U series