问题：
[单选题]由于用户不当操作等各种原因，可能造成系统发生故障，为了能够把计算机还原到某个指定的状态，Windows设置了______组件解决这个问题。
A、系统更新
B、安全更新
C、自动更新
D、系统还原
参考答案：
D
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