Python自动化，出现此Error的原因

需求:实现自动化打开Windows10的DeviceManager(设备管理器),并利用uiautomation操作DeviceManager窗口,如点击File按钮
问题:句柄查找失败(但是其他句柄可找到，如IE,Pycharm等的句柄)
代码如下:

import pyautogui
import uiautomation


def step1():
    pyautogui.press("Win")
    pyautogui.write("Device Manager", 0.1)
    pyautogui.press("Enter")
    pyautogui.sleep(1)

    pyautogui.press("Enter")
    DM = uiautomation.WindowControl(searchDepth=1, Name="Device Manager")
    DM.SetTopmost(True)
    DM.ButtonControl(Name="File").Click()


if __name__ == '__main__':
    step1()

报错内容:
LookupError: Find Control Time Out: {Name: 'Program Manager', ControlType: WindowControl}