Sistema x64 com apenas o tempo de execução x86 instalado:
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SQL Server Compact Edition\v3.5\ENU]
"DesktopRuntimeVersion"="3.5.8080.0"
"DesktopRuntimeServicePackLevel"="2"
Sistema x64 com x86 e x64 instalados:
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SQL Server Compact Edition\v3.5\ENU]
"DesktopRuntimeVersion"="3.5.8080.0"
"DesktopRuntimeServicePackLevel"="2"
"DesktopRuntimeVersion_x64"="3.5.8080.0"