There are certain times when Windows fails to identify a hardware device, by showing yellow question mark against the device in the device manager, due to not enough information being available or because there are no know device drivers available in the Windows database, that can be used to run the device.
In such cases, if you do not have the original device driver media CD/DVD, the device becomes practically useless. Unknown Device Identifier is a freeware that will help you identify unknown windows devices marked with a yellow question mark in the device manager.
Unknown device manager reports a detailed summary of such devices including the manufacturer name, OEM name, device type, device model and even the exact name of the unknown devices.
With the collected information, you might contact your hardware manufacturer for support or search the Internet for the corresponding driver with a simple click. With this utility, you might immediately convert your unidentified unknown devices into identified known devices and find proper driver on the Internet and contact the hardware device manufacturer or vendor.