Identify unknown devices not recognized by Windows in your system especially after you reinstall your system and cannot figure out what all those yellow question mark labeled devices really are. Help you search for workable drivers on the Internet and contact hardware manufacturer or vender directly. Driver backup is optional after you have all your device drivers installed. USB 1.1/2.0 Device, IEEE 1394 Device, ISA Plug and Play Device, AGP Bus Device and PCI Device can all be identified. Driver backup is optional. English and French interfaces. Unknown Device Identifier is licensed as freeware, full size of the download is 0.80 MB. You may download a free version of Unknown Device Identifier by following download link at Free Download section of this page. Unknown Device Identifier is developed or distributed by ZhangDuo Corporation International and is listed under system.