How to clean Windows Event Viewer log - Manualy

[Kiriakos GR]

Windows Event Viewer log this is the most useful tool for operating system diagnosis and troubleshooting.

Usually they are recorded too many notification messages and a lesser quantity of system errors. 
Either way, over the years I did found one text based script (regular .BAT file), this described as Reset_Reliability_Monitor.bat

Copy the text bellow in to a new text file, then rename it to Reset_Reliability_Monitor.bat and run it. 

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reg add "HKLM\SOFTWARE\Microsoft\Reliability Analysis\WMI" /v WMIEnable /T REG_DWORD /D 1 /F
del /f /S /Q /A "%ProgramData%\Microsoft\RAC\Outbound\*"
del /f /S /Q /A "%ProgramData%\Microsoft\RAC\PublishedData\*"
del /f /S /Q /A "%ProgramData%\Microsoft\RAC\StateData\*"
del /f /S /Q /A "%ProgramData%\Microsoft\RAC\Temp\*"
@echo off
FOR /F "tokens=1,2*" %%V IN ('bcdedit') DO SET adminTest=%%V
IF (%adminTest%)==(Access) goto noAdmin
for /F "tokens=*" %%G in ('wevtutil.exe el') DO (call :do_clear "%%G")
echo.
echo goto theEnd
:do_clear
echo clearing %1
wevtutil.exe cl %1
goto :eof
:noAdmin
exit