Today I ran into this problem when setting up the SQL Server Management Tools for SQL Server 2005. Like any good little code slinger, I googled (if you are particular to Microsoft, you can read that as “binged”) to see who’s had the problem, because it’s no news that when you aren’t on the crest of the tech wave that someone else has had the same issue. In particular, MSXML 6 would fail and the log would have a message similar to: MSI (s) (40:58) [22:16:00:859]: MainEngineThread is returning 1605...