Installation: how is LibreOffice installation stored in Windows registry

[scampsd]

Good morning,
While installing LibreOffice on a customer’s PC, I’d like to know if it has been installed before.

Following a piece of source code, I expect this information to be found in the Windows Registry, under key "\HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\LibreOffice\".

However, after having installed LibreOffice 5.3, I’ve found a registry entry at key "\HKEY_LOCAL_MACHINE\SOFTWARE\LibreOffice\LibreOffice\".

Which is correct or is it possible that the key has been changed during one of the latest versions?
Thanks

[mikekaganski]

The differences are caused by different bitness of the LO installed. If you install 32-bit version, it will be seen under Wow6432Node on a 64-bit OS; if you install 32-bit version on 32-bit OS, or 64-bit version on 64-bit OS, it will create keys under HKEY_LOCAL_MACHINE\SOFTWARE\LibreOffice.

So, to reliably check for an installed version (e.g. in a script), you should check both locations (check \HKEY_LOCAL_MACHINE\SOFTWARE\LibreOffice\UNO\InstallPath, and if not found, check \HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\LibreOffice\UNO\InstallPath).