Donate Us : Upgrade Windows Server 2012 R2 to Windows Server 2019 1. Prepare - DC11 : Domain Controller( ) - DC16 : Domain Member(running Windows Server 2012 R2) - A Windows Server 2019 DVD 2. Step by step : Upgrade DC16 to Windows Server 2019 - DC16 : Upgrade to Windows Server 2019 + Start - cmd, type : systeminfo === Check OS Name : Microsoft Windows Server 2012 R2 Datacenter + Insert Windows Server 2019 DVD - Double-Click - Upgrading === Done + Start - cmd, type : systeminfo === Check OS Name : Microsoft Windows Server 2019 Datacenter === OK + Open C: drive - Check folder + Start - Disk Cleanup - Clean up system files - Tick'Windows upgrade log files' + 'Previous Windows installation(s)' - OK - Delete Files - Yes # Delete folder ---------------------------******************** ********************------------------------