3、 打开设备管理器，展开通用串行总线控制器，检查USB Root Hub是否存在。如果驱动被卸载，可能是误删了USB Root Hub所致。 4、 如果没有USB Root Hub，我们点击设备管理器顶部的操作，所示。 5、 在展开的选项里，选择扫描检测硬件改动，即可重新下载USB Root Hu。

The Savitech USB audio driver installation package will install a root CA certificate into the Windows trusted root certificate store, in an incident that's reminiscent of the Superfish and eDellRoot ...

Ok, I've got a really wierd problem with a computer at work.<BR><BR>On every other reboot (if it's ok and I reboot the problem arises, if I reboot again it's ok), the OS somehow loses the drivers or ...

There's nothing more frustrating than your computer suddenly saying it can't recognize the USB device connected to the port. This is especially true when you're urgently trying to transfer a file to a ...