On a 64-bit platform, installed-check fails for SQL Reporting Services and Add-ins. The installer is checking the registry entries under path "HKEY_LOCAL_MACHINE\Software\Microsoft\Microsoft SQL Server\Instance Names" and registry entry is available out there, but since MS SQL Server is a 64-bit application, therefore, the installer is redirected to the path "HKEY_LOCAL_MACHINE\Software\WOW6432node\Microsoft\Microsoft SQL Server\Instance Names" and there are no entries for the same. So the install check fails.
Workaround: I have tested it with manually creating entries under "HKEY_LOCAL_MACHINE\Software\WOW6432node\Microsoft\Microsoft SQL Server\Instance Names\RS" and after that the install check is successful.
In short, on an x64 platform, installed-check is referring registry keys from WOW6432node and not the 64-bit ones.
So, how could I force my 32-bit installer to access 64-bit registries for correct installed-check?
I have tried RegDisableReflectionKey and related functions as an alternative for registry redirection, but it didn't work at my end.
How can I fix this problem?
Microsoft has published information on Registry Reflection which includes a description of the KEY_WOW64_64KEY for RegOpenKeyEx.
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