I know that it is supported, that was the first thing I checked this afternoon. I'm more concerned about any hidden gotcha's from doing shutdown on one server (2003), copying data files to 2003R2 and doing the startup. I haven't found any concerns and I think Oracle won't care (I'm hoping it shrugs its virtual shoulders and says "Meh, Windows is Windows, I don't care", but I don't want them to build an R2 server and then find out that it won't work and then have to make them build a 2003 server. Steve -----Original Message----- From: Bobak, Mark [mailto:Mark.Bobak@xxxxxxxxxxxx] Sent: Monday, September 17, 2012 7:19 PM To: sjwales@xxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx Subject: RE: Upgrading OS from Win 2003 to Win 2003 R2 Check 'Certifications' on MOS. (I think you'll find it's supported.) -Mark -- //www.freelists.org/webpage/oracle-l