Winamp v5.666.3516 is a software product for Windows developed by Nullsoft, Inc.
It is reported that the following Windows processes are part of Winamp v5.666.3516:
If you want to remove Winamp v5.666.3516 from your computer, just go to Start > Control Panel > Add/Remove programs and select Winamp v5.666.3516 from the list of programs.