HKEY_CLASSES_ROOT\Interface\{00112233-4455-6677-8899-AABBCCDDEEFF}\TypeLib
HKEY_CLASSES_ROOT\CID\{GUID}
(and …\CID.Local\{GUID}
HKEY_CLASSES_ROOT\SVCID\{GUID}
(and …\SVCID.Local\{GUID}
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
contains guid-keys.