Unknown Device Identifier

http://www.zhangduo.com/udi.html
Unknown Device Identifier enables you to identify the yellow question mark labeled Unknown Devices in Device Manager. And reports you a detailed summary for 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. Known devices recognized by Microsoft Windows will also be analyzed independent of the operating system.
You are suggested to do a thorough driver backup with My Drivers after you have identified all the unknown devices with their proper device drivers software installed.

Supported OS: Windows 95, Windows 98, Windows 98SE, Windows Me, Windows 2000, Windows XP, Windows Server 2003, Windows Server 2008, Windows Vista, Windows 7, Windows 8, and Windows Server 2012. Future OS are supported via the online update. You might even run the small freeware utility from CD or floppy.