Unity 5.5.0f3 (64-bit) is a software product for Windows developed by Unity Technologies ApS
It is reported that the following Windows processes are part of Unity 5.5.0f3 (64-bit):
If you want to remove Unity 5.5.0f3 (64-bit) from your computer, just go to Start > Control Panel > Add/Remove programs and select Unity 5.5.0f3 (64-bit) from the list of programs.