
I am currently attempting to upgrade my version of SQL Server Express Edition to Developer edition.
I have come across this Failure message, can someone
A.) Explain is a basic clear way what this actually means so I can get my head around it.
and
B.) Suggest a solution for this problem
Instead of trying an in-place upgrade, and in addition to repairing the counters via the KB article mentioned in the error message, I suggest you install a proper instance of Developer Edition. Then back up your user databases from Express, restore them on Developer, and once you are happy that everything is working, uninstall Express Edition. In addition to avoiding peculiar upgrade issues when moving to a new edition and a new version (unless you don’t really mean Express is SQL Server 2008), you also have the added bonus that you still have your original databases intact (which you won’t have if the upgrade fails in worse ways than simply being blocked).