rem Configure the eventlog to overwrite as required, and only keep 1024k of data
rem Works on Windows 2003 / 2008 servers

reg add "\\%servername%\HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Security" /v MaxSize /t REG_DWORD /d 1024 /f
reg add "\\%servername%\HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Security" /v Retention /t REG_DWORD /d 0 /f
reg add "\\%servername%\HKLM\SYSTEM\CurrentControlSet\Services\EventLog\System" /v MaxSize /t REG_DWORD /d 1024 /f
reg add "\\%servername%\HKLM\SYSTEM\CurrentControlSet\Services\EventLog\System" /v Retention /t REG_DWORD /d 0 /f
reg add "\\%servername%\HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application" /v MaxSize /t REG_DWORD /d 1024 /f
reg add "\\%servername%\HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application" /v Retention /t REG_DWORD /d 0 /f