question

SQL Server 2012 is not supported on Windows 2003, so perhaps that's why the Upgrade Assistant isn't either. That said, I found a post [here][1] that says "You may also need to install the Windows Installer 4.5 and the .NET Framework 4.0 if they are not already installed." Perhaps that would work or maybe not depending on the exact requirements check of the installer. Alternatively, you could run the advisor on a different computer as suggested [here][2]. Good luck. [1]: http://blogs.msdn.com/b/arvindsh/archive/2012/10/13/where-can-i-download-sql-2012-upgrade-advisor.aspx [2]: https://social.msdn.microsoft.com/forums/sqlserver/en-US/a4baa3a8-f25d-410f-9426-c4772481ad44/sql-server-2012-upgrade-advisor-on-windows-2003