SonicStage Ver.4.3 Upgrade is a software product for Windows developed by Sony Corporation
It is reported that the following Windows processes are part of SonicStage Ver.4.3 Upgrade:
If you want to remove SonicStage Ver.4.3 Upgrade from your computer, just go to Start > Control Panel > Add/Remove programs and select SonicStage Ver.4.3 Upgrade from the list of programs.