现在我家电脑一按键盘任意一个键就会关机是怎么回事

可能键盘短路。最好换一个键盘试一下，如果还有这种情况，

可能PS2接口有问题，你换一个USB的键盘就可以了。
电脑要时常清理玩起来才会流畅的比如一些文件残留啊或者把游戏换面设置调到最低，
用腾讯电脑安全管家，游戏加速功能，加速游戏速度，
然后清理电脑里不用的垃圾，
限制其他浏览也可以，流畅游戏。

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