Continuous Grow file Setupapi.log, WINLOGON High CPU usage and takes a long time to log on to a Windows.
Use filemonitor or ProcessExplorer to diagnostic. C:\WINDOWS\setupapi.log contains information about application installation, it log file is used to trace the cause of problems should they arise after an installation of a device or drivers. Incident: In my case file C:\WINDOWS\setupapi.log is big and WINLOGON. EXE consume high CPU went users login in the server. Workaround: Open your registry editor. Go to “HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\Setup\LogLevel” registry key. Set LogLevel key to 0 Restart server. More Info: http://msdn.microsoft.com/en-us/library/ff550845(v=vs.85).aspx http://support.microsoft.com/kb/958909/es