for 64 bits system, try the reg key
"HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\FusionInventory-Agent"
instead of
"HKEY_LOCAL_MACHINE\Wow6432Node\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\FusionInventory-Agent"
_________________________
Christophe
