The Event Viewer allows you to browse the Event Logs. You can view event summaries, event details, or edit event-logging options.
Events can be information, warnings, or errors.
The System Log includes information about successful printing and domain controller synchronization, as well as notification of services that failed to start and the error messages that were returned. The Security Log can include logons and logoffs, file access successes or failures, startups, shutdowns, and so on. Much of what gets logged here is determined by the Audit Policy, which will be discussed in the Accounts and Policies topic. The Application Log allows you to view error messages generated by Windows NT applications. Any errors, warnings, or information will show up here, listing the application that generated the message.