Event Log time when Computer Start up / boot up [duplicate]
EventViewer ( System Log )
6009 and 6005 same time stamp, system just started.
6013 - system has been up for a day or more, time in seconds.
6006 - the system was rebooted or shutdown.
PowerShell: Get All Reboot Messages in the Last Month
Get-EventLog -LogName System -After $(Get-Date).AddMonths(-1) | Where { 6009,6005,6006 -contains $_.EventID}
Look for the message saying the event log has started.
Event 6005 Event Log Service has started
Or Event 6009 with info about the OS build, service peck level, etc.