it will help to solve your problem: Registry key: HKEY_CLASSES_ROOT\Licenses\4250E830-6AC2-11cf-8ADB-00AA00C00905 Default value: kjljvjjjoquqmjjjvpqqkqmqykypoqjquoun add this manually or using your installer. now your mscomm32.ocx is licenced and ready for use without rebooting