Windows will report licensing details if you run the following from an elevated console window:
slmgr.vbs /dlv
The Windows Script Host popup will shortly tell you which edition of Windows you're running, which licensing channel you fall under (retail, OEM, volume), your activation ID, license status, rearm counts, and KMS details.
Apparently upgrading from a developer version of SQL Server is possible. These screenshots are from an MSDN installation of SQL Server 2008 and entering a non-MSDN key will presumably legitimise the bits for production use (I don’t have a retail or volume key available so this is a guess at this stage).
To get here, re-run the installation wizard and select Edition Upgrade from the Maintenance screen:
Then enter your new product key or use a free edition instead:
You can also do this at the command line:
Setup.exe /q /ACTION=editionupgrade /INSTANCENAME=<MSSQLSERVER or instancename> /PID=<PID key for new edition>" /IACCEPTSQLSERVERLICENSETERMS
