In most cases, the affected hardware device is likely to have been previously connected to the computer, disconnected for some time, and then connected to the same computer.Īt some point, perhaps, the system, for some weird or unknown reason, fails to recognize the device. We have come to associate the manifestation of the error where Code 45 appears as a key term in the message with the events where Windows struggles to recognize a connected hardware device. To fix this problem, reconnect the hardware device to the computer. In that case, the message probably continues or ends with this sentence: Or perhaps, you saw the error message when you accessed the Properties window for the troubled hardware device (from the Device Manager application). The standard notification is usually in this form:Ĭurrently, this hardware device is not connected to the computer. Subsequently, an error message came up to inform you that something had gone wrong. You probably connected a hardware device – such as a mouse, keyboard, or even Bluetooth headset – to your computer, but Windows failed or refused to recognize it.

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