http://blogs.msdn.com/b/ai/archive/2012/05/08/upgrading-sql-server-2008-to-sql-server-2008-r2-using-command-line-in-unattended-mode.aspxThe below command can be used to upgrade SQL server 2008 to SQL server 2008 R2 silently , please enter the correct instance name. setup.exe /Action=Upgrade / InstanceName=MSSQLSERVER /q /IAcceptSQLServerLicenseTermsen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/ai/archive/2012/05/08/upgrading-sql-server-2008-to-sql-server-2008-r2-using-command-line-in-unattended-mode.aspx#10303142Wed, 09 May 2012 14:04:06 GMT91d46819-8472-40ad-a661-2c78acb4018c:10303142Papy Normand<p>Thanks, you are quicker than Lucky Luke</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10303142" width="1" height="1">http://blogs.msdn.com/b/ai/archive/2012/05/08/upgrading-sql-server-2008-to-sql-server-2008-r2-using-command-line-in-unattended-mode.aspx#10303040Wed, 09 May 2012 12:00:21 GMT91d46819-8472-40ad-a661-2c78acb4018c:10303040Ahmed Ibrahim - MSFT<p>Thanks a lot for the feedback, corrected.</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10303040" width="1" height="1">http://blogs.msdn.com/b/ai/archive/2012/05/08/upgrading-sql-server-2008-to-sql-server-2008-r2-using-command-line-in-unattended-mode.aspx#10303033Wed, 09 May 2012 11:51:53 GMT91d46819-8472-40ad-a661-2c78acb4018c:10303033Papy Normand<p>Just a little reproach : i have difficulties to read &quot;correct instance name&quot; &nbsp;deep green and black , it is not easy to read . The part InstanceName=MSSQLSERVER is good.</p> <p>I hope you will not be vexated by my small remark ( i have poor old eyes )</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=10303033" width="1" height="1">