Event Logs are saved under [C:\WINDOWS\system32\config\] as [*.evt] files but are locked by [services.exe]. Therefore can’t be deleted and even if you do so are automatically recreated on next reboot. So if you need to delete one of the Event Log Sections under : [Computer Management > System Tools > Event Viewer] the easy way to do that is Windows PowerShell tool. No reebot is needed after that, just make shure you close and reopen the Computer Management console.
*EventLogName – that should be exacly as it is under Computer Management > System Tools > Event Viewer