SetupAPI Device Installation Log Entries
In Windows Vista and later versions of Windows, SetupAPI logs information about device installation in a plain-text log file that you can use to verify the installation of a device and to troubleshoot device installation problems. If a signing problem exists, SetupAPI will log information about the signing problem in the log file. The name of this log file is SetupAPI.dev.log, and it is located, by default, in the Windows INF file directory (%SystemRoot%\inf).
The SetupAPI log for Windows Vista and later versions of Windows is an enhanced version of the SetupAPI log that is supported by Windows Server 2003, Windows XP, and Windows 2000. The SetupAPI log for Windows Vista and later versions of Windows includes an enhanced format that makes it easier for a reader to locate and understand the logged information.