Did you ever try to identify devices in your device manager that have a yellow icon ? Devices with yellow icons are unknown devices that give you almost zero information about the type of the device. The freeware Unknown Device Identifier displays a list of unknown, disconnected or old devices with information about each of those devices.

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Normally you do not see which devices have been connected to your computer in the past. It could be interesting to say the least to find out if someone else connected a device to your computer in your absence. You have to change a value in windows using the command prompt.

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