Introduction:Windows Event Viewer log messages can be queried using the command line. This process is slightly different depending on which version of Windows you are using.Requirements:Access to the Windows command line and filesystem.Procedure:On Windows OS’s pre-Windows Vista:Open the command line and browse to the directory containing the eventquery.vbs script:cd C:\WINDOWS\system32Then, you can specify which log you are trying to work with. For example, if you are using the Application log, you can use the Application argument.cscript eventquery.vbs /L Application /VYou can further refine your search by including a search pattern. This can be done by piping the output of the query to the findstr command which will be able to pattern match the output. For instance, if you want to find the string “Performance counters for the WmiApRpl” in the output of the Application log, you can use:cscript eventquery.vbs /L Application /V | findstr /C:"Performance counters for the WmiApRpl"If you want to specify the level of the event, such as “Information,” you can include:cscript eventquery.vbs /L Application /V /FI "Type eq Information"| findstr /C:"Performance counters for the WmiApRpl"On Windows Vista or later:Once you have determined which log you would like to query, type something such as:wevtutil qe SystemThis will query the System log. If you have an archived .evt log file, you can find the text “license found” using:wevtutil qe "C:\Directory\SubDirectory\logFile.evt" /lf:true | findstr /C:"license found"If you want to restrict searches to only include a certain event level, you can query for them using their level number. Level 4 is Information, 3 is Warning, 2 is Error, and 1 is Critical.More Information:For more information, type:cscript eventquery.vbs /?on Windows OS’s pre-Windows Vista, orwevtutil /?for Windows Vista or later.