HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\nnn

nnn is a three digit code that identifies an SQL Server version (for example: 140 = SQL Server 2017).

Some subkeys under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\nnn might be:

• vv.0
• Bootstrap
• ConfigurationState
• DQ
• DQC
• DTS
• Machines
• Master Data Services
• sql_shared_aa
• sql_shared_mpy (which seems to be related to Python)
• sql_shared_mr (which seems to be related to R)
• SQLyyyy (yyyy = 2017…)
• SSIS
• Tools
• UpgradeIncompleteState