How to diagnose "Operating system supported for edition" pre-requisite errors while installing SQL 2008 Standard Edition for Small Business - The Official SBS Blog - Site Home - TechNet Blogs: http://blogs.technet.com/b/sbs/archive/2010/07/21/how-to-diagnose-quot-operating-system-supported-for-edition-quot-pre-requisite-errors-while-installing-sql-2008-standard-edition-for-small-business.aspxI've seen this a couple of times in migration where the SQL doesn't think it's being installed in a SBS network.