When Was Windows 2012 R2 Last Rebooted (What Is The Event ID For A Reboot)? Posted on by Webmaster IT Support Forum › Forums › Windows › Windows Server 2012 › General Discussion › When Was Windows 2012 R2 Last Rebooted (What Is The Event ID For A Reboot)? Tagged: Event Log, Reboot, Uptime This topic contains 0 replies, has 1 voice, and was last updated by Webmaster 2 years, 4 months ago. Author Posts June 13, 2017 at 3:51 pm #2135 WebmasterKeymaster To see when Windows was last rebooted, search the Event Log for Event ID 6009. Each occurrence of Event 6009 shows when Windows Server 2012 R2 was last rebooted. Author Posts You must be logged in to reply to this topic.