You have a computer that runs Windows XP Professional Service Pack 2 (SP2). You need to configure the computer so that Windows updates are downloaded nightly. You must prevent the updates from being installed automatically. What should you do?（）

A. Modify Automatic Updates.
B. Install and configure Windows Defender.
Create a scheduled task that runs gpupdate.exe /sync.
D. Create a scheduled task that runs winnt32. exe /duprepare.