扬天t4900安装win7鼠标键盘没反应？（win7安装鼠标键盘）

如果是”新电脑“安装win7系统，首先要解决”USB3.0“驱动的问题，大家可以到网络下载内置USB3.0驱动的win7系统版本，安装完后所有的USB设备就可以正常使用了。

详细操作步骤：在网上下载内置USB3.0驱动的win7系统，下载完成后打开”系统安装“工具，依次点击”还原系统“-”win7系统文件存放路径“-”点击C盘“-”确定“就可以了，最后电脑重启后系统会自动安装，不用任何手动操作！

老电脑安装win7鼠标键盘失灵解决方法

老电脑安装win7后，鼠标键盘失灵的问题并不常见，导致的原因有可能是”USB接口供电不足“或”主板USB驱动兼容的问题“。

解决方法是首先更换一个PS/2圆口的鼠标，然后到该电脑主板的官网去下载最新版的USB驱动程序，或者使用第三方驱动安装工具，例如“驱动人生”更新主板USB驱动程序。

如果更新完驱动后USB接口还是不可用，那么就说明是”主板USB接口供电有问题“，大家可以使用外置电源的USB集线器，将所有的USB设备都连接在外置USB集线器接口上，由于该设备的电源是外置的，不从主板供电，所以就可以解决主板USB设备供电不足的问题。

总结

这个问题如果是”新电脑“，大家可以直接使用内置USB3.0驱动的WIN7系统就可以解决，那么要是”老电脑“安装win7后出现这个问题，大都是因为USB接口供电的问题。

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